Abstract:
An apparatus and method for delivering an aerosol-forming composition and a separate functional composition for generating a functionalized aerosol vapor which emulates the organoleptic characteristics and properties of mainstream smoke experienced by smoking traditional tobacco-based smoking articles. The apparatus can comprise a battery section comprising a first housing, a battery disposed within the first housing, and a first connector coupled to the housing, an aerosol section comprising a second housing, an aerosol forming chamber disposed within the second housing, and a pod bay; and an insert section comprising a third housing, a connector, and a mouth end. The battery section can be configured to couple to the aerosol section, the aerosol section can be configured to couple to the insert section, and the connector can be configured to fit within the pod bay.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of priority to U.S. provisional application No. 62/081,870, filed 19 Nov. 2014, which is hereby incorporated by reference as though fully set forth herein. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to methods, compositions and apparatus for generating a functionalized aerosol which emulates the organoleptic characteristics and properties of mainstream smoke generated by traditional tobacco-based smoking articles. 
       BACKGROUND 
       [0003]    Electronic cigarettes are a popular alternative to traditional smoking articles that burn tobacco products to generate mainstream smoke for inhalation. Unlike traditional tobacco-based smoking articles, electronic cigarettes generate an aerosol-based vapor for inhalation which generally emulates mainstream smoke of traditional tobacco based smoking articles. However, it is generally recognized that aerosol-based vapor generated by electronic cigarettes does not deliver the same “quality” of experience as traditional smoking articles. Applicants have found that this deficiency in the “quality” of experience results, at least in part, from the use of a composite aerosol forming liquid solution to generate the aerosol-based vapor. More specifically, the composite aerosol forming liquid solution includes an aerosol forming liquid and one or more taste, fragrance or nicotine delivery compositions. Among other things, it is believed that the use of such a composite aerosol forming liquid solution may result in the formation of chemically or pharmacological incompatible components. Furthermore, it is believed that interactions among the various components of the composite aerosol forming liquid solution may cause chemical, pharmacological, and/or thermal instability, which, in turn, may result in particulate precipitation, fouling of the aerosol heating element or chemical degradation of the solution, as well as other constraints to aerosol vapor delivery. Each of these deficiencies compromises the organoleptic performance and quality of the aerosol based vapor generated by the electronic cigarettes. Accordingly, it is desirable to provide improved methods, compositions and apparatus for generating functionalized aerosols having enhanced organoleptic characteristics and properties which more closely emulate the smoking experience provided by the mainstream smoke from traditional tobacco-based smoking articles. 
       SUMMARY OF THE INVENTION 
       [0004]    An objective of the invention is to provide a method, composition and apparatus for generating a functionalized flavor aerosol vapor which emulates the organoleptic characteristics and properties of mainstream smoke experienced by users smoking traditional tobacco-based smoking articles. 
         [0005]    In one embodiment, an apparatus for generating a functionalized aerosol can comprise a battery section comprising a first housing, a battery disposed within the first housing, and a first connector coupled to the housing, an aerosol section comprising a second housing, an aerosol forming chamber disposed within the second housing, and a pod bay, and an insert section comprising a third housing, a connector, and a mouth end. The battery section can be configured to couple to the aerosol section, the aerosol section can be configured to couple to the insert section, and the connector can be configured to fit within the pod bay. 
         [0006]    In another embodiment, an apparatus for generating a functionalized aerosol can comprise a battery section comprising a first housing, a battery disposed within the first housing, and a first connector coupled to the housing, an aerosol section comprising a second housing, an aerosol forming chamber disposed within the second housing, and a pod bay, and an insert section comprising a third housing, a pod bay, a separator, a flavor reservoir, a mouth end, and a through-hole. The battery section can be configured to couple to the aerosol section, the aerosol section can be configured to couple to the insert section, and the connector can be configured to fit within the pod bay. 
         [0007]    Furthermore, with respect to electronic cigarettes based on tank configurations, if the users want to change flavors they either have to use multiple tanks or subject the tank to inconvenient cleaning procedures. This limits the flexibility of simple tank electronic cigarettes. 
         [0008]    It is a further objective of the invention to provide a method comprising a two-step process for the formation of a functionalized aerosol vapor. The first step of the process involves generating an aerosol from an aerosol forming liquid. The second step of the process involves functionalizing the aerosol by subjecting the aerosol to a matrix for the purpose of transferring, delivering or imparting one or more organoleptic properties such as taste, fragrance and/or nicotine delivery to the aerosol. 
         [0009]    It is yet a further objective of the present invention to provide a method wherein the first step of generating an aerosol comprises providing an optimal aerosol density for the desired fragrance, taste, and/or nicotine delivery properties subsequently imparted on the aerosol in the second step of the process. 
         [0010]    It is yet a further objective of the present invention to provide a method wherein the first step of the process comprises generating an aerosol having properties for optimizing the taste, fragrance and/or nicotine delivery characteristics to the aerosol during the second step of the inventive method. For example, the aerosol forming liquid may comprise an excipient such as water which forms an aerosol having properties for activating exothermic or endothermic reactions during the second step of the process. 
         [0011]    It is yet another objective of the present invention to provide a method wherein the aerosol vapor pressure is used as a mechanism for transferring, delivering or imparting taste, fragrance and/or nicotine characteristics during the second step of the process. 
         [0012]    It is yet a further objective of this invention to provide an aerosol-forming composition and a separate functional composition for generating a functionalized aerosol vapor with emulates the organoleptic characteristics and properties of mainstream smoke experienced by smoking traditional tobacco-based smoking articles. For example, the aerosol-forming composition may comprise ethanol, glycerol, propylene glycol, polyethylene glycol, water, nicotine, or mixtures thereof. The functional composition may comprise one or more organoleptic components such as taste, fragrance, and/or nicotine delivery components. For example, the functional composition may comprise a solution or dispersion having taste and/or nicotine delivery components. Alternatively, the functional composition may comprise encapsulated taste and/or fragrance delivery components. Moreover, the functional composition may comprise a gel having taste, fragrance and/or nicotine delivery components. 
         [0013]    According to another aspect of the present invention, the taste, fragrance and/or nicotine composition may comprise a vapor pressure modifier such as ethanol. 
         [0014]    It is yet a further objective of the present invention to provide an apparatus for generating a functionalized aerosol vapor which emulates the organoleptic characteristics and properties of mainstream smoke experienced by smoking traditional tobacco-based smoking articles. In one embodiment, the apparatus comprises a first chamber or zone containing an aerosol-forming liquid which is adapted to deliver aerosol-forming liquid to a heating device. The apparatus further comprises a downstream chamber or zone containing an functional composition comprising one or more organoleptic components such as a taste, fragrance and/or nicotine delivery components. 
         [0015]    It is yet a further objective of this invention to provide a flavor insert for imparting flavor to an aerosol. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is a block diagram of a fragrance insert being used in an e-cigarette. 
           [0017]      FIG. 2  is a block diagram showing an unflavored aerosol being formed and subsequently flavored. 
           [0018]      FIG. 3  is an exploded isometric view of an e-cigarette comprising a flavorant insert. 
           [0019]      FIG. 4  is a flow diagram of one embodiment of an insert for an e-cigarette according to the disclosure. 
           [0020]      FIGS. 5-18  are flow diagrams of various embodiments of inserts for an e-cigarette according to the disclosure. 
           [0021]      FIG. 19  is an exploded isometric view of an embodiment of an electronic cigarette. 
           [0022]      FIG. 20  is a diagrammatic view of an embodiment of an electronic cigarette according to the disclosure. 
           [0023]      FIG. 21  is an exploded diagrammatic view of an embodiment of an electronic cigarette according to the disclosure. 
           [0024]      FIGS. 22A-22D  are isometric and contour views of several embodiments of an insert section according to the disclosure. 
           [0025]      FIGS. 23A and 23B  are isometric views of another embodiment of an insert section according to the disclosure. 
           [0026]      FIGS. 24A and 24B  are isometric views of another embodiment of an insert section according to the disclosure. 
           [0027]      FIGS. 25A-25F  are front and back isometric views of three embodiments of a separator. 
           [0028]      FIGS. 26A-26D  are front and back isometric views of a pod bay and a pod bay with a separator according to the disclosure. 
           [0029]      FIGS. 27A-27C  are isometric views of three embodiments of a flavor reservoir. 
           [0030]      FIGS. 28A-28C  are isometric views of embodiments of a flavor reservoir containing varying numbers of chambers. 
           [0031]      FIG. 29  is an isometric view of a flavor reservoir according to the disclosure. 
           [0032]      FIGS. 30A and 30B  are diagrammatic views of an embodiment of a mouth end that comprises a flexible cover. 
           [0033]      FIGS. 31A-31C  are front and back isometric views of several embodiments of sealed flavor reservoirs. 
           [0034]      FIGS. 32A-32D  are isometric views of embodiments of mouth ends according to an aspect of the disclosure. 
           [0035]      FIG. 33  is an isometric view of a separator comprising selectable exit ports. 
           [0036]      FIG. 34  is a sketch for a pressure releasable blister package containing flavor inserts. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0037]    According to one aspect of the present invention, a two-step process is used to form an aerosol with organoleptic properties suitable to be delivered with e-cigarettes. In the first step of the process, an aerosol is formed from a non-flavored formulation located in a first chamber or zone of the e-cigarette. Any aerosol formation mechanism (e.g., thermal, mechanical, piezoelectric) may be used in the present invention. The aerosol is then subjected to a taste, fragrance and/or nicotine carrying matrix adapted to transfer the desired organoleptic properties to the aerosol. During this step, taste, fragrance and/or nicotine delivery components in a high vapor pressure solvent are released into the aerosol prior to exiting the e-cigarette mouth piece.  FIG. 1  shows this two-step process wherein a fragrance insert is employed to deliver fragrance to the e-cigarette aerosol. Yet a further objective is to manufacture electronic cigarettes with removable and replaceable taste functional mouth pieces where it can self-contained a functional segment. 
         [0038]    The formation of an unflavored aerosol in an e-cigarette may involve any known nebulizer mechanism. For example, ultrasonic wave nebulization (with a piezoelectric element vibrating and creating high-frequency ultrasound waves to cause vibrations and atomization of liquid formulations), electric nebulization (with a heating element built on a high surface component in direct contact with an aerosol forming material), or spraying jet atomization by passing an aerosol solution through small venturi injection channels. In general, the aerosol characteristics depend on the rheological and thermodynamics properties of the aerosol forming liquid as well as the nebulization mechanism. Because of physical chemical stresses (i.e. thermal degradation, shear induced phase separation, etc.) of the aerosol forming material during nebulization, the aerosol characteristics and delivery consistency can be affected when the liquid is nebulized. This is very relevant to aerosol quality if the affected aerosol material component is organoleptic. For example, nicotine might degrade under thermal nebulization; menthol and other hydrophobic taste material might precipitate due to incompatibility with hydrophilic forming aerosol formulations. In other cases, desirable organoleptic materials, i.e. menthol, tobacco flavors, etc., can be insoluble in the aerosol forming liquid at the appropriate viscosity and/or surface tension to deliver an acceptable aerosol, therefore, limiting the amount of delivered organoleptic. Furthermore, improvements to the consistency of aerosol delivery might be possible with this strategy because the organoleptic material—which are absent during aerosol formation—would not affect the viscosity and the surface tension. These material variables affect aerosol particle size distribution. Having an aerosol formation process prior to flavoring insures aerosol consistency, in particular, when it is desirable to deliver a consistent nicotine amount by the aerosol exiting the mouth piece of the e-cigarette. 
         [0039]    Therein, that an unflavored aerosol formulation, located in the first chamber or zone, suitable to form aerosols with particle size distribution and/or density and deliver desired user experience, and that can be later further tailored for organoleptic delivery is attractive to e-cigarette manufacturers. Base aerosol formulations suitable for the present invention comprise aerosol forming materials, vapor pressure modifiers, buffers, salts, nucleation site structures, surfactants, preservatives, and an excipient. Furthermore, any of the components that form the unflavored aerosol formulation can be used to trigger chemically another component located downstream the nebulizer. For example, water can be used to activate exothermic or endothermic reactions of salts located in a downstream insert to induce heat changes that either heat a sublimable material insert or change deliverable aerosol particle size distribution. Non-limiting examples of unflavored aerosol forming formulations are included in Table I below. 
         [0000]    
       
         
               
             
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 Aerosol Formulations 
               
               
                 Organoleptic functionalized formulations 
               
             
          
           
               
                   
                   
                 Formulation Examples 
               
               
                   
                 Range 
                 (%) 
               
             
          
           
               
                 Function 
                 Component Example 
                 (%) 
                 1 
                 2 
                 3 
                 4 
                 5 
               
               
                   
               
             
          
           
               
                 Aerosol Former 
                 Glycols 
                 0-90 
                 60 
                 60 
                 60 
                   
                   
               
               
                 Aerosol Former 
                 Glycerin 
                 0-90 
                 10 
                   
                 20 
                 60 
                 60 
               
               
                 Vapor Pressure 
                 Ethanol 
                 0-30 
                   
                 20 
                   
                   
                 10 
               
               
                 Modifier 
               
               
                 Nucleation Site 
                 Salts: NaCl, Particle 
                 0-10 
                   
                 1 
                   
                 1 
               
               
                   
                 Dispersion, etc. 
               
               
                 Surfactant, 
                 Pharmaceutical 
                 0-5  
                   
                 1 
                 1 
                 1 
               
               
                 Particle Size 
                 Surfactants: Lecithin, 
               
               
                 Control 
                 Tweens, etc. 
               
               
                 Buffer 
                 Citrates, Phosphates 
                 0-10 
                   
                 3 
                 2 
                 3 
               
               
                   
                 Salt-Acid Pair 
               
               
                 Preservatives 
                 Alkyl 
                 0-3  
                 1 
                 1 
                 1 
                 1 
                 1 
               
               
                   
                 Hydroxyanisole or 
               
               
                   
                 Hydroxytoluene, etc. 
               
               
                 Others 
                 Nicotine, nicotine 
                 0-6  
                 1 
                 1 
                 2 
                 1 
                 3 
               
               
                   
                 derivatives, etc 
               
               
                 Excipient 
                 Water 
                 q.s. ad 
                 28 
                 13 
                 14 
                 13 
                 26 
               
               
                   
               
             
          
         
       
     
         [0040]    Taste, fragrance and/or nicotine carrying matrix formulations, applicable to this invention to change the organoleptic properties of the delivered aerosol are presented in the embodiments below. These formulations can be liquids, dispersions, gels, encapsulate fragrances, fibers or any other forms and shapes that allow intimate contact with the unflavored aerosol stream. These formulations may have a high vapor pressure to allow maximizing their fragrance contribution to the aerosol stream. Illustrative examples of functionalized formulations which may be incorporated in the e-cigarette are presented below. 
         [0041]    Fragrance Delivery 
         [0042]    The major formulation components in this embodiment, when the formulation is in a liquid state, consist of a fragrance, a vapor pressure modifier, a preservative and an excipient. These formulations might also contain other components to further modify the delivered aerosol stream such as surfactants, nucleation sites, buffers, etc. Table II shows non-limiting examples for solutions, dispersions, encapsulates and gel formulation physical forms. These formulations might contain nicotine as required by a final aerosol delivery specification. 
         [0000]    
       
         
               
             
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE II 
               
             
             
               
                   
               
               
                 Functionalized Formulations 
               
             
          
           
               
                   
                   
                 Formulation Examples 
               
               
                   
                 Range 
                 (%) 
               
             
          
           
               
                 Function 
                 Component Example 
                 Form 
                 (%) 
                 1 
                 2 
                 3 
                 4 
               
               
                   
               
             
          
           
               
                 Organoleptic 
                 Piña Colada, Cherry, 
                 Solution, 
                  0-100 
                   
                 10 
                   
                   
               
               
                   
                 Coffee, etc. 
                 Dispersion 
               
               
                   
                 Tobacco flavor 
                 Solution, 
                  0-100 
                 50 
               
               
                   
                   
                 Dispersion 
               
               
                   
                 Fragrance/Menthol 
                 Encapsulate 
                  0-100 
                   
                   
                 98 
               
               
                   
                   
                 Fibers 
               
               
                   
                 Fragrance/Taste/Tobacco 
                 Gel 
                  0-100 
                   
                   
                   
                 99 
               
               
                   
                 Flavor 
               
               
                 Others 
                 Nicotine, nicotine 
                 Liquid 
                 0-6  
                 1 
                 1 
                 2 
                 1 
               
               
                   
                 derivatives, etc 
               
               
                 Vapor Pressure 
                 Ethanol 
                   
                 0-30 
               
               
                 Modifier 
               
               
                 Nucleation Site 
                 Salts: NaCl, Dispersion 
                   
                 0-10 
                 5 
                 5 
               
               
                 Structures 
               
               
                 Surfactant, 
                 Lecithin, Tweens, etc. 
                   
                 0-5  
                 3 
                 3 
               
               
                 Aerosol Particle 
               
               
                 Size Control 
               
               
                 Buffer 
                 Citrates, Phosphates 
                   
                 0-10 
                 5 
                 5 
               
               
                   
                 Salt-Acid Pair, etc. 
               
               
                 Preservatives 
                 Alkyl Hydroxyanisole or 
                   
                 0-30 
                 1 
                 2 
               
               
                   
                 Hydroxytoluene, etc. 
               
               
                 Liquid 
                 Water, Glycol, 
                   
                 q.s. ad 
                 29 
                 74 
               
               
                 Excipient 
                 Glycerin, etc. 
               
               
                   
               
             
          
         
       
     
         [0043]    Low Solubility/Hydrophobic Organoleptic Fragrance Delivery 
         [0044]    When the solubility of the organoleptic material is low, there is a limit to the amount of organoleptic in an aerosol compatible formulation. By placing the organoleptic downstream from the aerosol forming part of the e-cigarette, it is possible to have formulations with high concentration of delivered organoleptics since they are not constrained by their low solubility in aerosol forming formulations. The formulation components in this embodiment can consist of a fragrance, a vapor pressure modifier, a preservative and an excipient. These formulations might also contain other components to further modify the delivered aerosol stream such as surfactants, nucleation sites, buffers, etc. The table below shows non-limiting examples for liquids, solutions and dispersions. 
         [0000]    
       
         
               
             
               
               
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE III 
               
             
             
               
                   
               
               
                 Functionalized Formulations 
               
             
          
           
               
                   
                   
                 Formulation Examples 
               
               
                   
                 Range 
                 (%) 
               
             
          
           
               
                 Function 
                 Component Example 
                 Form 
                 (%) 
                 1 
                 2 
                 3 
               
               
                   
               
             
          
           
               
                 Organoleptic 
                 Menthol Solution 
                 Liquid 
                  0-100 
                 20 
                 10 
                 10 
               
               
                   
                 Tobacco Flavor 
                 Solution, 
                  0-100 
                   
                 40 
               
               
                   
                   
                 Dispersion 
               
               
                   
                 Fragrance, Taste 
                 Solution 
                  0-100 
                 20 
                   
                 20 
               
               
                   
                 Components 
               
               
                 Others 
                 Nicotine, nicotine 
                 Liquid 
                 0-6  
                 1 
                 1 
                 2 
               
               
                   
                 derivatives, etc 
               
               
                 Vapor Pressure 
                 Ethanol 
                   
                 0-30 
                 30 
                 20 
                 30 
               
               
                 Modifier 
               
               
                 Nucleation Site 
                 Salts: NaCl, Dispersion 
                   
                 0-10 
                 5 
                 5 
                 5 
               
               
                 Structures 
               
               
                 Surfactant, 
                 Lecithin, Tweens, etc. 
                   
                 0-5  
                 3 
                 3 
                 3 
               
               
                 Aerosol Particle 
               
               
                 Size Control 
               
               
                 Buffer 
                 Citrates, Phosphates 
                   
                 0-10 
                 5 
                 5 
                 5 
               
               
                   
                 Salt-Acid Pair, etc. 
               
               
                 Preservatives 
                 Alkyl Hydroxyanisole or 
                   
                 0-3  
                 1 
                 2 
                 2 
               
               
                   
                 Hydroxytoluene, etc. 
               
               
                 Liquid 
                 Water, Glycol, 
                   
                 q.s. ad 
                 15 
                 14 
                 23 
               
               
                 Excipient 
                 Glycerin, etc. 
               
               
                   
               
             
          
         
       
     
         [0045]    Low Solubility/Hydrophobic Organoleptic Fragrance Delivery 
         [0046]    A. Chemical/Thermal Aerosol Delivery Activation 
         [0047]    Because in the practice of this invention two or more chambers, compartments or zones are used having different formulations, the invention also enables benefits resulting from their different nature to obtain further improvements in aerosol delivery. These improvements are inclusive for the embodiments disclosed in Table I, II and III above. Two specific cases are noted below: 
         [0048]    1. Chemical Equilibrium or Chemical Reactivity Activation 
         [0049]    According to this embodiment, the unflavored formulation may comprise a chemical component that can either react or affect another chemical component included in the downstream functionalized formulation. For example, it is known that nicotine in solution is in a chemical equilibrium as per the Bronsted-Lowry acid/base theory. Therefore, acidic or basic component—such as acetic, citric, etc., buffers—carried by the unflavored aerosol can be useful to control the ionization of nicotine in the final delivered aerosol. Therein, according to this embodiment, improvement in nicotine delivery consistency is possible. In addition, the formation in situ of fragile flavors and taste component is possible if reactants are kept separated until mixing in the aerosol vapor prior to delivery. 
         [0050]    2. Thermal Activation 
         [0051]    The inclusion of a chemical component in the unflavored formulation that can react with another chemical component included in the downstream formulation to exothermically or endothermically change the temperature of the aerosol. For example, water in the unflavored aerosol can react with a salt pod in the downstream portion of the e-cigarette to release heat of hydration, i.e., food grade Fe and Mn salts, CaO, etc. This heat can be used to assist in the sublimation of organoleptic in the downstream portion of the e-cigarette. Another example is the use of an endothermic reaction, i.e., food grade NH4Cl, etc. This would allow cooling of the aerosol vapor after its formation and therefore improve delivery consistency of the aerosol particle size distribution. 
         [0052]      FIG. 2  further illustrates this concept, whereby the unflavored aerosol is formed in the aerosol forming cartridge where an aerosol forming liquid is in contact with the heating element. As the aerosol moves downstream and interacts with the flavored insert, the aerosol becomes flavored. Though the sketch in  FIG. 2  shows separate e-cigarette major components, it will be understood that any combination of the battery, aerosol cartridge and/or fragrance insert may be physically integrated with each other as long as the fragrance insert is disposed downstream the aerosol cartridge as indicated by the arrows. 
         [0053]    This concept separates aerosol formation from taste, fragrance and/or nicotine delivery. Therefore, the aerosol is improved by removing any degradation of quality, nicotine delivery and taste caused by either the interaction of the aerosol forming liquid formulation with the formulation contained in the fragrance insert or its thermal degradation/inactivation when in contact with the heating element of the e-cigarette. 
         [0054]    In addition, the fragrance formulations in the inserts can be made with a broad range of materials such as normal solutions, dispersions, emulsions, gels, creams, powders, pastes, waxes, etc. The fragrance release can occur thermally, chemically, dissolution, vapor pressure driven, moisture, electric, etc. The insert can use fabricated using one or combination of different fragrance matrixes such as surface coating, dissolvable and non-dissolvable matrix, encapsulated fragrance, fibers, porous materials, wicking web, coated web, etc. 
         [0055]    Although, this concept is based on aerosol flow dynamics, it can be further enhanced by placing a heating element in the insert to control the release of fragrance. 
         [0056]    An embodiment of an apparatus of the present invention depicted below in  FIG. 3  comprises an e-cigarette having a cartomizer loaded with a glycol/water solution in addition to a cellulose acetate insert coated with tobacco flavors located prior to the mouth end. The aerosol delivered under this construction tasted as ‘tobacco flavored aerosol’. By way of further example, a vanilla flavored insert may be used to deliver a vanilla flavorant to aerosol delivery. 
         [0057]    The sketches proved in the following figures illustrate numerous embodiments of the proposed inserts for the practice of the present invention. These embodiments are non-limiting, and it will be understood that the present invention may comprise combinations of one or more of these embodiments that might be integrated into an electronic cigarette or manufactured as modular or removable. 
         [0058]    Porous Matrix of Embedded Coated Fibers or Hollow Fibers Filled with Fragrance Formulations 
         [0059]      FIG. 4  illustrates an embodiment of the present invention comprising fragrance formulations in a porous matrix of embedded fibers. The fragrance may be coated on the fibers on contained within hollow fibers. According to this embodiment, the fragrance migrates into the aerosol stream to flavor the aerosol stream. It can be activated optionally electrically or by dissolving a fragrance carrier. A similar release mechanism is applicable to numerous of the other embodiments described below. 
         [0060]    Single/Multiple Layer Screen Insert Where the Screen Carries Fragrances as Coated Fibers, Fragrances as Encapsulated Fibers, Etc. 
         [0061]      FIG. 5  illustrates an embodiment of the present invention comprising fragrances embedded in single or multiple layer screens for delivery to the unflavored aerosol vapor. According to this embodiment, for example, the release of encapsulated fragrances might be activated by water/glycol in an unflavored aerosol formulation. 
         [0062]    Woven or Non-Woven Web or Sheet Form with Erodible Material or any of the Previously Described Fragrance Carriers 
         [0063]      FIG. 6  illustrates an embodiment of the present invention comprising a web fabricated such that fragrances are released on interaction with the unflavored aerosol. 
         [0064]    Diffusible and/or Erodible Disk(s) 
         [0065]      FIG. 7  illustrates an embodiment of the present invention comprising a diffusible or erodible disk containing a functionalized formulation. For example, the disk can be formulated with a fragrance in a hygroscopic matrix that erodes during inhalation. 
         [0066]    Coil Wrapped Insert with a Coated High Area or Webbed Structure 
         [0067]      FIG. 8  illustrates an embodiment of the present invention comprising a coil wrapped insert having a coated area or webbed structure. The purpose of this design is to maximize the effective interaction between the unflavored aerosol and the flavoring insert. This design is also applicable to several of the embodiments disclosed herein. 
         [0068]    Porous Membrane or Open Cell Foam/Sponge 
         [0069]      FIG. 9  illustrates an embodiment of the present invention comprising the use of a porous membrane or open cell foam/sponge structure The porous membrane can be made of cellulose or any other highly absorbing material applicable for fragrance/nicotine carrying. The e-cigarette shown in  FIG. 3  with a tobacco flavor embedded material placed toward the mouth end is an embodiment of this design. 
         [0070]    Plaited Flavor Coated Insert 
         [0071]      FIG. 10  illustrates an embodiment of the present invention comprising a plaited flavor coated insert. In addition of maximizing the effective interaction area for the un-flavored aerosol and the flavoring insert, this plaited design benefits from venturi acceleration to drive fragrance into the aerosol stream. 
         [0072]    3-Dimensional Flavor Coated Insert 
         [0073]      FIG. 11  illustrates an embodiment of the present invention comprising a configured flavor coated insert. In addition to the ease of construction of a solid insert, the insert can be fabricated from an erodible fragrance/nicotine matrix. One or multiple flow path can be used to control the flow dynamic and maximize the impacting energy of the un-flavored aerosol on the flavoring insert. 
         [0074]    Tube Bundles 
         [0075]      FIG. 12  illustrates an embodiment of the present invention comprising bundled tubes containing fragrances/nicotine that is releasable on differential pressure, temperature or electrical activation. Inhalation can also be a fragrance releasing force. 
         [0076]    Fragrance/Nicotine Coated Channel in a Honeycomb Insert 
         [0077]      FIG. 13  illustrates an embodiment of the present invention comprising a honeycomb cell structure with fragrance/nicotine pods. Control of release can be obtained by having different releasing rates distributed among the honeycomb cells. This concept of controlling the fragrance releasing rate by changing the rate of activation across the flavoring insert is applicable to other embodiments of the present invention. 
         [0078]    Fragrance Release by Inhalation—I 
         [0079]      FIG. 14  illustrates an embodiment of the present invention comprising a capsule containing fragrance/nicotine which releases its load under inhalation pressure. This approach can be used to change the flagrance as an OFF/ON flavor option. Although  FIG. 14  shows the flavoring of an unflavored aerosol stream, it is also applicable for changing the flavor of a flavored aerosol. This insert can be used sequentially. These concepts are also applicable below to the embodiments directed to fragrance release by inhalation or by being physically crushed. 
         [0080]    Fragrance Release by Inhalation or Physically Crushed—II 
         [0081]      FIG. 15  illustrates an embodiment of the present invention comprising a fragrance insert that can be broken under inhalation pressure or by being physically crushed to release fragrance into the aerosol stream. 
         [0082]    Fragrance Releasing Non-Web/Web Pouch 
         [0083]      FIG. 16  illustrates an embodiment of the present invention comprising a pouch having a non-woven web of non-woven sensitive material normally having interstices capable of passing smoke upon activation. The web is compressed and bonded, while compressed, to hold the fibers in compressed condition filling the interstices to prevent passage of its load outwardly thereof. The payload can be fragrance(s), tobacco flavor, nicotine delivery enhancing chemical material(s)s, or other material(s) desired for modification of the unflavored aerosol. The pouch releases its load on puncturing. The web can react or dissolve with one or more chemical components in the unflavored aerosol to be activated. Therefore, the pouch formulation provides the benefit of improved shelf life by being protected from interaction with the environment and with each other prior to usage. 
         [0084]    Fragrance Releasing Pouch 
         [0085]      FIGS. 17 and 18  illustrate embodiments of the present invention comprising a pouch containing a payload. The load can be fragrance(s), tobacco flavor(s), nicotine(s),nicotine delivery enhancing chemical materials, or other material(s) desired for the modification of the aerosol organoleptic properties. This pouch releases its load on mechanical, thermal activation or similar mixing mechanism such as puncturing, crushing, opening a valve, etc. Because the pouch formulation is within a sealed container, the users have an ON/OFF option of using it to modify the aerosol organoleptic experience. This invention is inclusive of the use of multiple pouches or chambers placed in a carousel arrangement in alignment with the aerosol stream such that users can select a particular flavor to be delivered during usage of the e-cigarette. In addition, the formulations benefit of improved shelf life by being protected from interaction with the environment and with each other prior to usage. 
         [0086]      FIG. 19  illustrates another embodiment according to the disclosure.  FIG. 19  illustrates an electronic cigarette  200  comprising a battery section  201 , an aerosol section  202 , and a flavorant section  203 . The electronic cigarette  200  can be configured to produce an aerosol on demand when air is drawn through the electronic cigarette  200 . In other embodiments the electronic cigarette  200  can produce aerosol when a user performs an action. In yet other embodiments, no heater is required to form an aerosol. In the illustrated embodiment, a user can draw on a proximal end of the electronic cigarette, which can draw air through an interior portion of the electronic cigarette and out the proximal end. A more detailed description of an electronic cigarette can be found in commonly assigned U.S. application Ser. No. 13/099,266 filed 2 May 2011, the entire disclosure of which is hereby incorporated by reference as though fully set forth herein. The battery section  207  can comprise a cap  204 , a first housing  205 , a battery, and a battery section connector  207 . The cap  204  can be configured to fit within a distal end of the first housing  205  and in at least one embodiment can comprise a plastic material that can be partially transparent. The first housing  205  can comprise a metal alloy, a plastic, or the like. The battery  206  can also be within and surrounded by the first housing  205 . The battery section connector  207  can be coupled to the first housing  205  and can be configured to connect to the aerosol section  202 . 
         [0087]    The aerosol section  202  can comprise a second housing, a heater  211 , an aerosol forming compound  213 , an airflow path  212 , an aerosol section distal connector  210 , and an aerosol section proximal connector  215 . The second housing  214  can comprise a metal alloy, a plastic, or the like. In one embodiment, the aerosol forming compound  213 , the heater  211 , and the airflow path  212  can be surrounded by and within an interior of the second housing  214 . The aerosol section distal connector can be sized and configured to connect to the battery connector  207 . In one embodiment one of the connectors can form a screw thread and the other connector can form a screw receptacle. In another embodiment one of the connectors can form a snap-fit connector and the other connector can form a snap-fit receptacle. In another embodiment one of the connectors can comprise at least one projection that is configured to fit within at least one matching space or receptacle in the other connector. In another embodiment the battery connector  207  and the aerosol section distal connector can form a friction fit. 
         [0088]    The heater  211  can comprise a metal coil in liquid contact with the aerosol forming compound. In one embodiment the heater  211  can be mostly surrounded by the airflow path  212  and can be wound around a wick (not shown) that extends into the aerosol forming compound  213  and transports the aerosol forming compound  213  to the heater  211 . In another embodiment, the heater  211  can comprise a metallic mesh that can extend from the airflow path  212  into the aerosol forming compound and that is sized and configured to transport the aerosol forming compound  213  across the heater  211 . In yet another embodiment, the heater  211  can comprise a ceramic material. The ceramic material can extend from the airflow path  212  into the aerosol forming compound  213  and can be configured to transport the aerosol forming compound to the portion of the heater  211  within the airflow path  212 . In one embodiment, the ceramic material can be porous. In one embodiment, the battery  206  in the battery section  201  can be electrically connected to the heater  211  in the aerosol section  202 . The electrical connection between the battery  206  and the heater  211  can comprise at least one wire connecting the battery to the heater  211 . In another embodiment, the electrical connection between the battery  206  and the heater  211  can comprise electrical traces disposed within or on the battery section  201  and the aerosol forming section  213 . In yet another embodiment, the electrical connection between the battery  206  and the heater  211  can comprise a combination of electrical wires and electrical traces. 
         [0089]    The airflow path  212  can be configured to draw air from outside the electronic cigarette  200  at a place distal to the heater  211  and to direct the air drawn into the electronic cigarette  200  across the heater and towards the flavorant section  203 . In one embodiment, the airflow path  212  can comprise a tubular, non-porous, insoluble material that extends the length of the aerosol section  202 . In an embodiment where the airflow path  212  is nonporous and insoluble, the airflow path  212  can be used keep the aerosol forming compound from the interior of the airflow path  212 . The aerosol section proximal connector  215  can be configured to connect to the flavorant section  203 . 
         [0090]    The flavorant section can comprise a third housing  221 , a flavorant  220 , a flavorant section connector  217 , and a mouth piece  222 . The third housing  221  can surround the flavorant  220  and can be coupled to the flavorant section connector  217 . The flavorant section connector  217  can be sized and configured to connect to the aerosol section proximal connector  215 . In one embodiment one of the connectors can form a screw thread and the other connector can form a screw receptacle. In another embodiment one of the connectors can form a snap-fit connector and the other connector can form a snap-fit receptacle. In another embodiment one of the connectors can comprise at least one projection that is configured to fit within at least one matching space or receptacle in the other connector. In another embodiment the flavorant section connector  217  and the aerosol section proximal connector can form a friction fit. 
         [0091]    The flavorant  220  can comprise materials as will be described later in this disclosure. The flavorant  220  can be configured to transfer a flavor or other substance to an aerosol that passes through the flavorant section  203 . In one embodiment, the flavorant  220  can comprise a flavor and nicotine. In other embodiments the flavorant can only comprise a flavor. In yet another embodiment, the flavorant can comprise only nicotine. The mouth piece  222  can be configured to fit within a distal end of the first housing  205  and in at least one embodiment can comprise a plastic material 
         [0092]    In one embodiment, the aerosol section proximal connector can further be configured to receive a separator  216 . The separator  216  can be sized and configured to fit within the aerosol section proximal connector  215  of the aerosol section  202  and can separate the aerosol forming compound  213  from a flavorant  220  of the flavorant section  203 . In another embodiment, the separator  216  can be sized and configured to fit within the flavorant section connector  217  of the flavorant section  203  and can separate the aerosol forming compound  213  from a flavorant  220  of the flavorant section  203 . 
         [0093]      FIG. 20  illustrates another embodiment of the disclosure.  FIG. 20  depicts an electronic cigarette  300  comprising a first section  301 , a second section  302 , and a mouth end  324 . The first section  301  can comprise a first housing  305 , a battery, and a first connector  307 . The second section  302  can comprise a second housing  314 , a second connector  308 , an aerosol forming chamber  313 , a first separator  316 , and an insert  326 . The aerosol forming chamber  313  can be within and surrounded by the second housing  314 . The aerosol forming chamber  313  can be adjacent to the first separator  316 . The first separator  316  can be configured to separate the aerosol forming chamber  313  from the rest of the second section  302 . The second section  302  comprise a void or space in which an insert  326  can be placed. The insert  326  can comprise a flavor or other compound that can move into an aerosol or other vapor that passes through the insert  326 . The mouth end  324  can comprise an end plug  325 , a second separator  323 , and a mouth piece  322 . In one embodiment, the end plug can be a projection extending from a distal portion of the mouth end  324 . The void or space in the second section  302  can also be sized and configured to receive a portion of the mouth end  324  to secure the mouth end  324  to the electronic cigarette  300 . The end plug  325  can be sized and configured to fit within the second section  302  through a friction fit or other appropriate structure as known to one of ordinary skill in the art. The second separator  323  can be configured to separate the insert  326  from the mouth piece  322  and can also be configured to control the aerosol that is delivered to a user using the electronic cigarette  300 . 
         [0094]    In one embodiment, the electronic cigarette  300  of  FIG. 20  can use a rechargeable battery that is configured to couple to a disposable second section. The second section can be purchased containing an unflavored aerosol forming compound and further comprising a void in which a desired insert can later be placed by the user. In some embodiments the unflavored aerosol can comprise a solution containing nicotine. The user can then place a desired removable insert into the second section, attached the mount piece to the second section and use the electronic cigarette. The removable insert can comprise at least one flavor, a desired level of nicotine, or both. If the user desires a different flavor or nicotine level they can remove the mouth piece from the electronic cigarette, remove the insert, and place a new insert within the second section. Once the user has depleted the aerosol forming substance in the second section, the second section can be thrown away or recycled, and a new second section can be attached to the rechargeable battery. 
         [0095]      FIG. 21  illustrates another example of an electronic cigarette  350  according to the disclosure.  FIG. 21  depicts an electronic cigarette  350  comprising a battery section  351 , an aerosol section  352 , and an insert section  353 . The battery section  351  can comprise a first housing  355 , a battery, and a first connector  356 . The aerosol section  352  can comprise a second housing  357 , an aerosol forming chamber  360 , and a separator and pod bay  361 . The aerosol forming chamber  360  can be within and surrounded by the second housing  357 . The separator and pod bay  361  can be sized and configured to couple to the insert section  353 . The insert section can comprise a third housing  365 , a connector  362 , a flavorant  363 , a second separator  364 , and a mouth end  366 . The flavorant  363  can comprise at least one flavor, a desired level of nicotine, or both. The second separator  364  can be configured to separate the flavorant  363  from the mouth end  366 . The second separator can be further configured to control delivery of an aerosol to the mouth end  366  of the electronic cigarette  350 . The connector  362  can be sized and configured to fit within the separator and pod bay  361  of the aerosol section  352 . In other embodiments, the connector  362  can be sized and configured to surround the separator and pod bay of the aerosol section. 
         [0096]      FIGS. 22A-22D  depict various views of several embodiments of an insert section according to the disclosure. The embodiment of the insert section  400  depicted in  FIGS. 22A and 22B  can comprise a separator  401 , a flavor reservoir  402 , and a mouth end  403 . The flavor reservoir  402  can comprise a flavorant or other substance that can be transferred to a passing aerosol. The flavor reservoir  402  can be configured to connect to or abut the mouth end  403 . The mouth end  403  can comprise a through-hole that can allow for air to pass through the mouth end  403  and to a user. The separator  401  can be coupled to the flavor reservoir  402 . In one embodiment the separator  401  can be configured to releaseably couple to the flavor reservoir  402  and can further be configured to fit within a cavity or receptacle of an aerosol section or other receiver. In another embodiment, the separator  401 , the flavor reservoir  402 , and the mouth end  403  can be coupled together during manufacture such that they are unable to be used if taken apart by a user or other individual. 
         [0097]    The embodiment of the insert section  420  depicted in  FIGS. 22C and 22D  can comprise a separator  421 , a flavor reservoir  422 , and a mouth end  423 . The flavor reservoir  422  can comprise a flavorant or other substance that can be transferred to a passing aerosol. The flavor reservoir  422  can be configured to fit within a cavity of the mouth end  423 . The mouth end  423  can comprise a through-hole that can allow for air to pass through the mouth end  423  and to a user. The separator  421  can be coupled to the flavor reservoir  422 . 
         [0098]      FIGS. 23A and 23B  illustrates several isometric views of another embodiment of an insert section  440  according to the disclosure. The embodiment of the insert section  440  depicted in  FIGS. 23A and 23B  can comprise a pod bay  445 , a separator  441 , a flavor reservoir  442 , a mouth end  443 , and a through-hole  448 . The pod bay  445  can further comprise a cavity  446 . The cavity  446  can be sized and configured to securely receive the separator  441 . The separator  441  can comprise at least one puncture device  447 . The at least one puncture device  447  can be a hollow pointed tube. The at least one puncture device  447  can be made of varying materials depending on the desired application. In one embodiment, the at least one puncture device  447  can be made of metal. In another embodiment, the at least one puncture device  447  can be made of a plastic. The at least one puncture device  447  can also be made of other materials in other embodiments. In one embodiment, the at least one puncture device can be configured to puncture a seal on the flavor reservoir  442  or the puncture device can be configured in  443  to puncture  442 . The at least one puncture device  447  can then direct an aerosol to desired portions or areas of the flavor reservoir  442 . The flavor reservoir  442  can comprise a flavorant or other substance that can be transferred to a passing aerosol. In one embodiment, the flavor reservoir  442  can be configured to fit within an interior cavity of the mouth end  443 . In another embodiment, the flavor reservoir  442  can be figured to abut the mouth end  443  and a separate housing or surround can be used to enclose the flavor reservoir  442 . The flavor reservoir  442  can be coupled to the mouth piece  443  by a friction fit, a projection, or other methods known by one of ordinary skill in the art as well as constructed as puncturing cover 
         [0099]      FIGS. 24A and 24B  show several isometric views of another embodiment of an insert section  460  according to the disclosure. The embodiment of the insert section  460  depicted in  FIGS. 24A and 24B  can comprise a pod bay  465 , a separator  461 , a flavor reservoir  462 , a mouth end  463 , and a through-hole  468 . The pod bay  465  can further comprise a first cavity  466  and a second cavity  469 . The first cavity can be sized and configured to join with an aerosol section or other section of an electronic cigarette. The second cavity  469  can be sized and configured to securely receive the separator  461 . The separator  461  can comprise at least one puncture device  467 . In one embodiment, the at least one puncture device can be configured to puncture a seal on the flavor reservoir  462 . The at least one puncture device  467  can then direct an aerosol to desired portions or areas of the flavor reservoir  462 . The flavor reservoir  462  can comprise a flavorant or other substance that can be transferred to a passing aerosol. In the illustrated embodiment, the flavor reservoir  462  can be contained within the mouth end  463 . In one embodiment, the flavor reservoir  462  can be integral with the mouth end  463 . 
         [0100]      FIGS. 25A-25F  show several different embodiments of a separator according to the disclosure.  FIG. 25A  shows a back view and  FIG. 25B  shows a front view of one embodiment of a separator  500 . The separator  500  can comprise an aerosol entry  501 , at least one aerosol exit  503 , and an outer wall  502 . An aerosol can enter the separator  500  through the aerosol entry  501  and can then be split into a plurality of streams through the at least one aerosol exit  503 . The streams of aerosol leaving the separator  500  can be determined by the number, diameter, and location of the at least one aerosol exit  503 . After passing through the at least one aerosol exit  503 , the aerosol stream can intermingle with a flavor or other material contained in the flavor reservoir as described throughout this disclosure. The outer wall  502  of the separator  500  can be sized and configured to fit within a housing of an electronic cigarette. The outer wall  502  can be sized such that the separator  500  is secured within the electronic cigarette and can also comprise shapes to better distribute aerosol as it leaves the separator  500 . 
         [0101]      FIG. 25C  shows a back view and  FIG. 25D  shows a front view of another embodiment of a separator  520 . The separator  520  can comprise an aerosol entry  521 , at least one aerosol exit  523 , and an outer wall  522 . An aerosol can enter the separator  520  through the aerosol entry  521  and can then be split into a plurality of streams through the at least one aerosol exit  523 . The outer wall  522  of the separator  520  can be sized and configured to fit within a housing of an electronic cigarette. In the current embodiment, the outer wall  522  can further comprise a conical section  524  that can be shaped to deliver aerosol to different longitudinal portions of a flavor reservoir. 
         [0102]      FIG. 25E  shows a back view and  FIG. 25F  shows a front view of another embodiment of a separator  540 . The separator  540  can comprise an aerosol entry  541 , at least one aerosol exit  543 , and an outer wall  542 . An aerosol can enter the separator  540  through the aerosol entry  541  and can then be split into a plurality of streams through the at least one aerosol exit  543 . In the illustrated embodiment, the at least one aerosol exit  543  can comprise a plurality of hollow projections configured to extend into the flavor reservoir. In at least one embodiment, the at least one aerosol exit can be configured to puncture a seal on the flavor reservoir. The outer wall  542  of the separator  540  can be sized and configured to fit within a housing of an electronic cigarette. 
         [0103]      FIGS. 26A-26D  illustrate a front and back view of a pod bay  560 .  FIG. 26A  shows a back view of a pod bay  560  and  FIG. 26B  shows a front view of a pod bay  560 . The pod bay  560  comprises a first cavity  562 , a second cavity  565 , and a pod wall  561 . The first cavity  562  can comprise a cavity wall  563  and a cavity lip  564 . The cavity wall  563  and the cavity lip  564  can be configured to securely hold a separator or other device within the electronic cigarette. In one embodiment, the cavity wall  563  and the cavity lip  564  can be sized such that a separator is coupled to the pod bay  560  through a friction fit. In another embodiment, the cavity wall  563  and the cavity lip  564  can more loosely hold the separator. The second cavity  565  can be sized and configured to couple the back side of the pod bay  560  to another portion or section of an electronic cigarette. The pod wall  561  can be shaped to fit within a housing or other enclosure of the electronic cigarette.  FIG. 26C  shows a back view and  FIG. 26D  shows a front view of a pod bay  560  with a separator  566 . The pod bay  560  comprises a pod wall  561  and a second cavity  565 . The separator  566  is abutting the cavity lip  564  shown in  FIG. 26B . The separator  566  can comprise at least one puncture device  568 . The at least one puncture device  568  can comprise a hollow tube. 
         [0104]      FIGS. 27A-27C  depict three embodiments of a flavor reservoir  600  according to the disclosure.  FIG. 27A  depicts a flavor reservoir  600  comprising a homogeneous density matrix. An aerosol that enters the flavor reservoir  600  can commingle with the flavor or other substance located within the flavor reservoir  600 .  FIG. 27B  depicts a flavor reservoir  610  comprising a low density matrix  613  and a high density matrix  612 . The low density matrix  613  can comprise the center of the flavor reservoir  610  as shown in  FIG. 27B . As the low density matrix  613  can hold more liquid, the higher concentration of flavor or other substance can migrate towards the outer layers.  FIG. 27C  depicts a flavor reservoir  620  comprising a low density matrix  624  and a high density matrix  625 . The high density matrix  625  can comprise the center of the flavor reservoir  620  as shown in  FIG. 27C . As the low density matrix  624  can hold more liquid, the higher concentration of flavor or other substance can migrate towards the inner layer or layers. 
         [0105]      FIGS. 28A-28C  depict embodiments of a flavor reservoir  630  with varying numbers of chambers.  FIG. 28A  illustrates a flavor reservoir  630  with a first chamber  631 . The first chamber  631  can comprise a cylindrical space within the flavor reservoir  630 . In other embodiments the first chamber  631  can comprise other shapes and sizes within the flavor reservoir. The first chamber  631  can further comprise an adsorbent matrix.  FIG. 28B  illustrates an embodiment of a flavor reservoir  640  with a first chamber  641  and a second chamber  642 . In one embodiment, the first chamber  641  can comprise a first flavor or other substance, and the second chamber  642  can comprise a second flavor or other substance. In one embodiment, the first chamber  641  and the second chamber  642  can be the same size and shape. In a separate embodiment, the first chamber  641  can be a different size than the second chamber  642 . The first chamber  641  and second chamber  642  can further comprise an adsorbent matrix  FIG. 28C  illustrates another embodiment of a flavor reservoir  650  with a first chamber  651 , a second chamber  652 , and a third chamber  653 . In one embodiment, the first chamber  651  can comprise a first flavor or other substance, the second chamber  652  can comprise a second flavor or other substance, and the third chamber  653  can comprise a third flavor or other substance. In one embodiment, the first, second, and third chambers  651 ,  652 ,  653  can be the same size. In another embodiment, the first, second, and third chambers  651 ,  652 ,  653  can vary in size and shape. 
         [0106]      FIG. 29  shows an embodiment of a flavor reservoir  660  according to an aspect of the disclosure. The flavor reservoir  660  comprises at least one recess  667  and at least one thermal fin  665 . The at least one thermal fin  665  can be designed with temperature control functionality. The thermal fin  665  can allow for tailoring the taste profile and delivery rate of the flavorant or other substance under different product configurations. The at least one thermal fin  665  can comprise a metallized foil, fins, etc. as part of the flavor reservoir  660 . The at least one thermal fin  665  can also comprise other thermally conductive materials. The at least one thermal fin  665  can allow for a passive temperature control of the flavor reservoir  660 . In another embodiment, the flavor reservoir  660  can comprise an electrically active heater. The heater can cause a warming effect to control a temperature of the flavor reservoir  660 . 
         [0107]      FIGS. 30A and 30B  illustrate an embodiment of a mouth end  700  according to an aspect of the disclosure. The mouth end  700  can comprise an exit passage  702 , a flexible cover  701 , and a through-hole  703 . The mouth end  700  can further be configured to abut a flavor reservoir  706 . The flexible reservoir  706  can comprise an impermeable flexible membrane downstream from the flavor reservoir  706 . The flexible cover  701  can cover the exit passage  702  and can be secured in one section such that a negative pressure or draw on an exterior portion of the mouth end  700  adjacent the through-hole  703  can cause an aerosol to move from the flavor reservoir  706 , through the exit passage  702 , and out the through-hole  703 . The flexible cover  701  can be stiff enough such that it can cover or mostly cover the exit passage  702  while the negative pressure is not present, but flexible enough to allow a passage for an aerosol or air stream to move through the mouth end  700  when a negative pressure is created. In one embodiment, the negative pressure can be created by a user drawing on the end of the mouth end  700 . The flexible cover  701  can be used to maintain freshness of the flavor reservoir  706  and quality of an aerosol delivered to an exterior portion of the mouth end  700 . In another embodiment, the mouth end  700  can comprise a pressure activated valve. The pressure activated valve can comprise a moving ball at the exit of the flavor reservoir. The pressure activated valve can open during inhalation by a user and close when the mouth end  700  is not in use. The pressure activated valve can also be used to protect the freshness or flavor of the flavor reservoir  706 . 
         [0108]      FIGS. 31A-31C  depict several embodiments of a flavor reservoir with an impermeable seal.  FIG. 31A  depicts a front view and  FIG. 31B  depicts a back view of an embodiment of a flavor reservoir  750 . The flavor reservoir  750  can comprise a first seal  751  and a second seal  752 . The first and second seals  751 ,  752  can comprise aluminum foil, paper, plastic, etc. The first and second seal  751 ,  752  can be configured to limit the exposure of the internal portion of the flavor reservoir  750  to outside air or other substances. In one embodiment, the first and second seals  751 ,  752  can be removed by a user pulling on the seal. In another embodiment, one of the seals can be punctured before use.  FIG. 31C  depicts a front view of another embodiment of a flavor reservoir  760 . The seal  761  can cover all of the passages on a section of the flavor reservoir  760  or only a portion of the passages present on a section of the flavor reservoir  760 . 
         [0109]      FIGS. 32A-32D  depict embodiments of an exit portion  801  and at least one aerosol exits  803  of various mouth ends  800 . The exit portion  801  of the mouth end  800  can be shaped in various ways. The exit portion  801  can be shaped for consumer taste or other reasons. The at least one aerosol exit  803  present in the mouth end  800  can comprise various configurations. The configurations can be used to deliver an aerosol to a user in a stream, a cloud, or other method. The various configurations can be used to tailor a vaping experience to a user. 
         [0110]      FIG. 33  shows an embodiment of a separator according to the disclosure. The separator  850  can comprise an outer wall  851 , a first exit port  852 , a second exit port  853 , and a third exit port  854 . The exit ports can be configured to allow a user to select a particular flavor chamber to control aerosol delivery. In one embodiment, a user can use the outer wall  851  of the separator  850  to move twist the separator  850  and select a desired flavor in a flavor reservoir. In other embodiments, a user can twist the separator to line up one or more exit ports with a compartment in a flavor reservoir containing a specific level of nicotine or other substance. 
         [0111]    Furthermore, the flavor containing inserts of this disclosure can be packaged as pressure releasable blisters, peelable ribbons or similar package strategies known in the packaging industry. One example of a package is shown in  FIG. 34  for a pressure releasable blister package of a plurality of flavor containers. 
         [0112]    Although several embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the spirit of the present disclosure. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the present teachings. The foregoing description and following claims are intended to cover all such modifications and variations. Further, although only certain embodiments of this invention have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this invention. 
         [0113]    Various embodiments are described herein of various apparatuses, systems, and methods. Numerous specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. It will be understood by those skilled in the art, however, that the embodiments may be practiced without such specific details. In other instances, well-known operations, components, and elements have not been described in detail so as not to obscure the embodiments described in the specification. Those of ordinary skill in the art will understand that the embodiments described and illustrated herein are non-limiting examples, and thus it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments, the scope of which is defined solely by the appended claims. 
         [0114]    Furthermore, the flavor containing inserts of this invention can be packaged as pressure releasable blisters, peelable ribbons or similar package strategies known in the packaging industry. An example is shown in  FIG. 34  for a pressure releasable blister package of a plurality of flavor containers 
         [0115]    Reference throughout the specification to “various embodiments,” “some embodiments,” “one embodiment,” “an embodiment,” or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in various embodiments,” “in some embodiments,” “in one embodiment,” “in an embodiment,” or the like, in places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, the particular features, structures, or characteristics illustrated or described in connection with one embodiment may be combined, in whole or in part, with the features structures, or characteristics of one or more other embodiments without limitation. 
         [0116]    It will be appreciated that the terms “proximal” and “distal” may be used throughout the specification with reference to a clinician manipulating one end of an instrument used to treat a patient. The term “proximal” refers to the portion of the instrument closest to the clinician and the term “distal” refers to the portion located furthest from the clinician. It will be further appreciated that for conciseness and clarity, spatial terms such as “vertical,” “horizontal,” “up,” and “down” may be used herein with respect to the illustrated embodiments. However, surgical instruments may be used in many orientations and positions, and these terms are not intended to be limiting and absolute. 
         [0117]    Any patent, publication, or other disclosure material, in whole or in part, that is said to be incorporated by reference herein is incorporated herein only to the extent that the incorporated materials does not conflict with existing definitions, statements, or other disclosure material set forth in this disclosure. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material.