Patent Publication Number: US-11390514-B1

Title: Liquid dispenser

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority from U.S. Provisional Patent Application No. 62/782,107 filed on Dec. 19, 2018 which is herein incorporated by reference in its entirety. 
    
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH 
     Not Applicable. 
     APPENDIX 
     Not Applicable. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to liquid dispensers, and more particularly to liquid dispensers which have a valve at the end of a container&#39;s spout and an outer section of the valve engages a portion of the receptacle to open the valve and allow fluid to flow from the container through the spout and the valve into the receptacle. 
     Related Art 
     Liquid dispensers have been used for dispensing fluids into receptacles, such as shot glasses and other drinkware, without unwanted spillage. Shot glasses are typically filled directly from the spout of a bottle or from the spout of a shaker for mixed drinks. To avoid messes and inaccurate pours with the corresponding waste of the drink, bottle stoppers with valves have been developed to dispense the fluids into shot glasses efficiently and accurately without spillage. For example, U.S. Pat. No. 600,901 describes a bottle stopper assembly with a spring-biased tubular stem and valve which allows a person to grasp the bottle and pull back a collar around the tubular stem to open the valve which allows liquid to flow through the stem&#39;s center tube. Although the bottle stopper of the &#39;901 Patent could be resized to fit into shakers for mixed drinks, such as U.S. Pat. No. 300,867, the diameter of the spout in a typical shaker container is relatively wide, usually around one-third (⅓) the diameter of the topside opening of the container, because the shaker is designed for pouring the mixed drink out through one side of the spout and a strainer that prevents ice particles from getting into the glass while air is allowed to flow into the container through the other side of the spout and the strainer. By placing the &#39;901 Patent&#39;s bottle stopper in the spout, air would be prevented from freely flowing back into the container which would result in a vacuum in the container as the drink is being poured and would result in too slow of a pour. Accordingly, bottle stoppers with valves that push inward to open such as disclosed in the &#39;901 Patent have not been incorporated into the spouts of standard shaker containers. Instead, other types of valves have typically been incorporated into shaker containers. 
     Some shaker containers have incorporated valves at the bottom of the container which help control the flow of the fluid out of the spout while other shaker containers have incorporated a valve in the cap that must be pulled to open the valve, and some of the shakers vary the size and shape of the spout and sometimes the location of its opening. For example, U.S. Pat. No. 196,605 discloses a shaker with a valve in the bottom of the container which can be depressed to allow air into the container as the drink is being poured from the spout at the opposite end of the shaker and can be released to stop the flow of air and reduce the flow of the drink from the spout. The &#39;605 Patent particularly notes that when the shaker is being shook to mix a drink, the handle should be grasped to ensure that the valve remains closed in its seated position, i.e., pushed against the opening. In another example, U.S. Pat. No. 2,181,612 discloses a shaker with a pump with a spout that extends along the side of the container from an internal aperture at the bottom side of the container to the external aperture toward the top of the container, and the pump has a valve that allows the fluid to flow to the bottom of the container as the pump is pulled upwards into the fluid. U.S. Pat. No. 2,102,520 discloses a long neck and a relatively narrow, elongated pour tube to the spout at the end of the neck, and the spout is again approximately one-third (⅓) the diameter of the topside opening of the container. It will be appreciated that with the long tube, the speed of the fluid flow when pouring the drink is likely going to be less than speed through the shorter spouts in the standard shaped shakers, such as the &#39;867 Patent and the &#39;605 Patent. 
     Spouts and nozzles with spring-biased flow tubes and valves that open by being pushed inwardly are known to be incorporated into other types of liquid containers that are used to fill tanks and other receptacles, such as fuel containers. For example, U.S. Pat. No. 4,982,881 describes a nozzle assembly that has a spring-biased valve member with a flange, and the assembly has a threaded collar that can screw over a threaded neck of the fuel container. Although a person could push or pull the flange toward the collar to open the valve in a manner similar to the &#39;901 Patent, the &#39;881 Patent explains that the flange can engage with the opening of a tank to push open the valve and allow the fuel to flow from the container through the nozzle&#39;s cylindrical tube into the tank. The &#39;881 Patent also describes the optional use of an adapter at the nozzle&#39;s discharge outlet for tanks which have an opening that is smaller than the outlet&#39;s diameter. 
     It has also been known to incorporate spring-biased valves into sippy cups and other drinkware containers. For example, U.S. Pat. No. 5,079,013 discloses a valve that is biased closed by a spring. However, in the &#39;013 Patent, the spring biases the body of the spring away from the spout opening to the closed position so that the sucking action overcomes the force of the spring and draws the spring&#39;s body toward the spout opening and opens the valve. There is no portion of the valve in the &#39;013 Patent that extends out of the spout because the valve does not open by pressing against the valve. Accordingly, it would change the principle of operation of the &#39;013 Patent and other similar devices to replace the pull-open valve mechanism with a push-open valve mechanism, and if such a replacement were to be done, it would render the new device unworkable for its intended purpose as a sippy cup because the sucking action would not open the valve. 
     Liquid dispensers in the prior art have also disclosed push-open valves at the end of a flexible, elongated tube. For example, as shown in U.S. Pat. No. 8,672,197, liquid is dispensed through the valve on the end of the tube, and one example of a valve is a push-open valve with a central stem. However, the liquid dispenser disclosed in the &#39;197 Patent either requires a user to use two hands to operate the liquid dispenser, with one hand holding the container and the other hand to operate the valve and dispense the liquid, or for single-handed operation, a stand needs to be used to hold the container. Using two hands to operate the dispenser means that when the user wants to grab something else, they have to drop the tube with the valve, and using a stand limits the user&#39;s range of use of the dispenser around the region of the stand. 
     There remains a need for a liquid dispenser with a push-open valve that can be used with a single hand without the need for a stand. There is also a desire for the dispenser to hold enough liquid to dispense multiple shots before needing to be refilled and to dispense fluid cleanly, without spills, waste, or mess. There is also a desire for efficient flow though the spout and valve, without a vacuum being produced in the container as fluid flows out of the container. Preferably, the push-open valve is operated by contacting an external part of the valve with a portion of the receptacle being filled and pushing the valve against the receptacle. 
     SUMMARY OF THE INVENTION 
     A liquid dispenser used to easily fill small containers, i.e. shot glasses, with hot or cold liquids, with precision and speed, without spillage. The liquid dispenser includes a base with a container section, a top with a lower section removably connected to the base an elongated neck and a spout, and a push-open valve at the end of the spout. When the dispenser is turned upside-down, an outer section of the valve engages a portion of a receptacle to depress the valve relative to the spout and open the valve which allows fluid to flow from the container through the spout and the valve into the receptacle. The push-open valve is held against the spout with a collar, and a spring biases the valve to its closed position. The diameter of the top&#39;s lower section is approximately equal to the diameter of the base&#39;s topside, and the spout&#39;s diameter is less than or equal to one-quarter (¼) of the second diameter. The longitudinal length of the top and the valve is greater than the height of the base. 
     In an aspect of the invention, the top includes an air inlet, and a tube extends from the air inlet to the topside of the base. A strainer can be attached to the top proximate to its lower section and a bottom end of the tube is surrounded by the inner sidewall of a central recess in the strainer. 
     In another aspect of the invention, the top and bottom can have a quick-connect releasable connection in which a 180° rotation or less of the top and bottom relative to each other change moves the respective parts between locked orientation and an unlocked orientation. 
     In yet another aspect of the invention, a bladder can be placed within the interior of the liquid dispenser, and a lid and/or thin-film membrane can seal the base or bladder for storage of mixed drinks or a premix powder or solution. 
     Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein: 
         FIG. 1A  is a cross-sectional view of a first embodiment of the liquid dispenser and includes a detail view. 
         FIG. 1B  is an exploded view of the liquid dispenser shown in  FIG. 1A . 
         FIG. 1C  is a side view of the liquid dispenser shown in  FIG. 1A . 
         FIG. 1D  is a front view of the liquid dispenser shown in  FIG. 1A . 
         FIG. 1E  is a perspective, cross-sectional view of the liquid dispenser shown in 
         FIG. 1A . 
         FIG. 1F  is a transparent view of the liquid dispenser shown in  FIG. 1A . 
         FIGS. 2A and 2B  are detail views of the valve and tip of the liquid dispenser disengaged from and engaging with the surface of a receptacle. 
         FIG. 3A  is a cross-sectional view of a second embodiment of the liquid dispenser and includes a detail view. 
         FIG. 3B  is a side view of the liquid dispenser shown in  FIG. 3A . 
         FIG. 4A  is a perspective view of a third embodiment of the liquid dispenser. 
         FIGS. 4B and 4C  respectively are a cross-sectional view and an exploded view of the liquid dispenser shown in  FIG. 4A . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. 
     Generally, as described in detail below and shown in the accompanying drawings, a liquid dispenser  10  has a rigid base  12  connected to a rigid top  14  and a valve  16  connected to a spout  40  of the rigid top. When the dispenser is in its upright orientation and the rigid base is separated from the rigid top, liquid(s)  110  can be poured into the base, and then the top connects to the base to seal the liquid(s) in the dispenser. As particularly shown in  FIG. 1A , a spring  18  is preferably held by a collar  20  between the spout and the valve and biases the valve to a closed position. The rigid top has a first arrangement separated from the rigid base as shown in  FIG. 1B  and a second arrangement connected to the rigid base as shown in  FIG. 1F . The collar is attached to the spout and connects the valve to the spout. The valve can be any type of push-open valve in which an outer portion  50  of the valve engages a surface of the receptacle  100 , such as when the dispenser is turned upside-down into its inverted orientation as shown in  FIG. 2A . As shown in  FIG. 2B , when the collar and the spout are moved further toward the receptacle&#39;s surface, the outer portion of the valve is pushed back relative to the collar and the spout against the force of the spring, and the inner portion  48  of the valve is unseated, thereby opening the valve and allowing fluid to flow from the container through the spout and the valve into the receptacle. When the spout is moved back away from the receptacle, the spring biases the valve back to its closed position so no fluid can exit the dispenser even when the dispenser is upside-down. 
     According to each one of the embodiments of the invention, the rigid base  12  has a container section  32  with an open end  34   a  at its topside  34   b . The rigid base has a central longitudinal axis (A b ), a height (H b ), and an internal volume (V b ), and the topside of the container section has a topside diameter (D t ) of its circular cross-section  70 . The rigid top  14  has a lower section  36   a , a tapered section  36   b , and an upper section  36   c . The lower section of the rigid top connects to the topside of the container section  32 . The lower section of the rigid top also has a circular cross-section with a diameter (D t ) that is approximately equal to the topside diameter (D l ≈D t ), and the spout has a diameter (D s ) that is less than or equal to one-quarter (¼) of the lower section&#39;s diameter (D s ≤¼ *D l ) and is preferably less than one-fifth (⅕) of the lower section&#39;s diameter (D s &lt;⅕ *D l ). The height of the rigid base is preferably greater than the diameter of the topside of the container section (H b &gt;D t ). The upper section of the rigid top has an elongated neck  38  that extends to the spout  40 . The elongated neck and the spout are offset a lateral distance (d l ) from the central longitudinal axis, and the neck&#39;s diameter (D n ) is less than or equal to one-third (⅓) of the lower section&#39;s diameter (D n ≤⅓*D l ), and the spout&#39;s diameter is less than the narrowest portion of the neck&#39;s diameter (D s &lt;D n′ ) 
     The valve  16  can preferably be removed from the neck and the spout by the releasable connection between the collar  20  and the spout  40  which would allow pouring out of the spout without any valve mechanism or for ease of cleaning the valve, spout, and collar between uses of the dispenser. A threaded engagement is preferably used for releasable connection between the collar and the spout. The spout has an external thread  42  and the collar has an internal thread  44  that mates with and screws onto the spout&#39;s external thread. The collar also has a central aperture  46 , and the valve&#39;s outer portion  50  extends through the central aperture while the spring  18  is situated between the valve&#39;s inner portion  48  and the spout. 
     As shown in the drawings, the preferred push-open valve mechanism is a spring-biased stem-valve, and the valve may be a stem-valve without any spring or may be a spring-biased tube-valve. For the preferred valve  16  shown in  FIG. 1B , the valve&#39;s outer portion has a central stem  52 , and the valve&#39;s inner portion has a valve body  54   a  with a center bore  54   b  and a peripheral surface  54   c . The collar includes an interior flange  56 , a central space  58 , and an internal sidewall  60  between the internal threads and the central aperture, and the spring is preferably a spiral compression spring with a wide end  18   a  that engages the interior flange and a narrow end  18   b  that engages with and is seated within the center bore in the valve body. The wide end of the spring may engage with the top of the spout rather than the interior flange. The central stem protrudes a distance (d s ) from the central aperture, and the spring pushes the valve body toward the central aperture when the valve is in the closed position as shown in  FIG. 1A . The stem is pushed the distance toward the central aperture, and the valve body is moved away from the central aperture toward the spout when the valve is in the open position as shown in  FIG. 2B . As shown in  FIG. 3A , the base of the valve body may alternatively be formed with tapered flaps  18   c  that can function as a spring. It will also be appreciated that no spring may be necessary for the push-open valve because when the dispenser is inverted, gravity will cause the valve to close because the weight of the valve and the pressure of the fluid forces the valve into the closed position as shown in the cross-sectional view of  FIG. 2A ; however, it is likely that some liquid could leak from the interior space of the collar and the spout as the valve is closing so the spring is preferable to bias the valve in the closed position even when the dispenser is in its upright orientation. 
     The peripheral surface of the valve body could seal directly against the collar&#39;s internal sidewall as shown by the closed position of the valve in  FIG. 2A . However, as shown in  FIG. 1A , preferably an O-ring  62  produces the seal between the valve body and the collar&#39;s internal sidewall. In particular, the O-ring is secured around the peripheral surface of the valve body and engages with a circumferential ledge in the internal sidewall around the central aperture. Accordingly, the O-ring is seated against the internal sidewall of the collar when the valve is in the closed position, and the O-ring is unseated from the internal sidewall when the valve is in the open position. The circumferential ledge within the central space of the collar is preferably formed by a tip  64   a  of the collar which has notched standoffs  64   b  around the central aperture which provide flow paths  120  for the fluid through the spout and valve and out of the tip into the receptacle  100  as it pushes against and depresses the valve&#39;s outer portion. 
     As explained in the background section above, traditional containers typically have a relatively wide spout as compared to the container base and do not have a valve in the spout so air can enter into the container as the fluid is poured through the spout. However, when there is a valve in fluid communication with the spout as in the present invention, it is more difficult for air to enter the container through the valve and spout as the liquid is being poured out which can create a vacuum in the container and prevent fluid from flowing out of the spout and the open valve, especially if the container section is full of liquid. An air inlet  66  is preferably be incorporated into the dispenser apart from the spout to allow air into the container as the fluid flows out. 
     In the embodiments shown in  FIGS. 1 and 3 , a peripheral wall  68  surrounds the internal side of the air inlet  66  and extends into the interior space of the rigid top. The air inlet and peripheral wall are preferably formed in the tapered section of the rigid top so that if a small amount of fluid leaks from the air inlet when the dispenser is upside-down in its inverted orientation, the fluid will be directed to the tip at the end of the spout and help prevent a spill outside the receptacle. A tube  22  preferably connects to the peripheral wall at its top end  22   a , and the tube&#39;s center section  22   b  extends toward the container section to the tube&#39;s bottom end  22   c  proximate to the open end of the topside of the container section. Preferably, the tube&#39;s bottom end extends to the plane of the opening in the topside, and as discussed below, the tube may extend below the opening plane. The tube has a central axis (A t ) that is aligned with the central longitudinal axis (A b ) of the rigid base (A t |A b ). 
     The tube functions with the air inlet as a type of a valve that allows air into the container section of the dispenser when the dispenser is in its inverted orientation and allows the free flow of ambient air outside the dispenser and the air in the rigid top when the dispenser is in its upright orientation. It will be appreciated that the air inlet could incorporate other types of valves, and the air inlet could be formed in different locations of the liquid dispenser. For example, the air inlet could incorporate a valve assembly similar to the air inlet valve described in the U.S. Pat. No. 5,079,013 which is incorporated by reference herein. As in the &#39;013 Patent, the air inlet valve could be located at the bottom of the dispenser in the container section or at the top of the dispenser in the rigid top. It will also be appreciated that an air inlet valve could be located at the bottom of the tube which may extend all the way to the bottom of the dispenser. These types of air inlet valves which have a spring operate when the force of the spring is overcome by an air pressure differential between the ambient air and a lower pressure within the dispenser as fluid exits the dispenser (even if it is a flap valve, the spring force is inherent to the flap structure). Therefore, the inclusion of such pressure activated valves has been found to slow the flow of the fluid from the dispenser, and the tube is preferred to provide a quick and smooth continuous flow through the spout and valve out of the tip. 
     The dispenser can be filled with cold liquids, ambient temperature liquids, or hot liquids. When the container section of the dispenser is filled with a hot liquid, the liquid heats up the air in the dispenser which increases the pressure of the air in the dispenser. When the tube is used with the air inlet, the free flow of air between the ambient conditions external to the dispenser and the air within the dispenser prevents any buildup of pressure within the dispenser. However, if an air inlet valve is used instead of the tube, a pressure-relief valve would preferably be incorporated into the top section of the dispenser to relieve the pressure buildup from hot liquids to the air within the dispenser. 
     In all of the embodiments, the combined length (L nsv ) of the elongated neck, the spout, and the outer portion of the valve is greater than one-half (½) of the topside&#39;s diameter (L nsv &gt;½*D t ) and is preferably greater than two-thirds (⅔) of the topside&#39;s diameter (L nsv &gt;⅔*D t ). The length (L vv ) of the narrowest part of the rigid top, measured from the vent in the tapered section to the outer portion of the valve, is preferably equal to or greater than the topside&#39;s diameter (L vv ≥D t ). In the embodiments shown in  FIGS. 1 and 3 , the longitudinal length (L t ) of the rigid top from the lower section to the outer portion of the valve is greater than the rigid base height (L t &gt;H b ). The larger size of the rigid top relative to the rigid base preferably results in the combined internal volume (V t ) of the rigid top and the valve from the spout to the bottom of the tube being greater than or approximately equal to the internal volume of the rigid base (V t ≥V b ). The relatively large volume in the rigid top in these embodiments is different from traditional shaker containers and other fluid dispensers which tend to maximize the a much larger volume of the container section in the base of the dispenser and as compared to the volume in the top section (V b &gt;&gt;V t ) which may only be a cap with a nozzle or other type of elongated neck extending to a spout, such as the top section of the embodiment shown in  FIG. 4 . The increased volume in the embodiments of  FIGS. 1 and 3  could be empty space that only contains air when the liquid dispenser is in its upright orientation or may contain ice or natural or artificial flavor enhancers. 
     The rigid top can be connected to the rigid base by any known releasable fastening mechanism or other mechanisms developed in the future. As explained in detail below, the releasable fastening mechanism in the embodiment shown in  FIGS. 1A-1F  has quick-connect features that allow a 180° rotation or less between the rigid top and the rigid base to move the respective parts relative to each other between a locked orientation and an unlocked orientation. Preferably, the locked orientation and the unlocked orientation are achieved with a quick-connect bayonet mount  72  hat only requires rotating the rigid top and the rigid base relative to each other by a quarter-turn or less (i.e., ≤90°). As shown in  FIG. 3A , the releasable fastening mechanism can be a threaded connection  74  between threads in the rigid top and threads in the topside of the rigid base. As shown in  FIG. 4B , the releasable fastening mechanism can be a snap-fit connection  76  between a circumferential lip and groove in the rigid top and a circumferential lip and groove with a complementary mating shape around the circumference of the rigid top. 
     As shown in  FIG. 1B , the liquid dispenser can also include a mounting ring  24 , a gasket  26 , and a strainer  28  between the topside of the container section and the lower section of the rigid top. The mounting ring is preferably attached to the rigid top through an overmolding process or may be integrally formed as a part of the lower section depending on the material used for the rigid top. The mounting ring preferably has an internal flange  78 , and the gasket is sandwiched between the internal flange and the topside of the container section. As discussed above with regard to the locking and unlocking of the rigid top and the rigid base, the mounting ring moves with the rigid top between the locked orientation and the unlocked orientation. The strainer is secured to the mounting ring between the lower section of the rigid top and the topside of the container section. The strainer has apertures  80  throughout its surface and a center recess  82  without apertures. The tube&#39;s bottom end  22   c  extends into the upper part of the center recess, and there is a space between the tube&#39;s outer circumference at the bottom end and the center recess&#39; the inner sidewall. The center recess acts as a splashguard so that as the container is turned upside-down, the center recess covers the tube&#39;s open bottom end and directs the fluid moving from the container section toward the neck and spout around the bottom end of the tube to ensure that fluid does not leak out from the venting hole. The strainer is preferably fastened to the ring through a releasable connection so that ice can be placed in the top part of the dispenser and the strainer holds the ice out of the liquid in the container section, preventing dilution of the liquid. Then, when the dispenser is turned upside-down to fill a shot glass with the mixed drink, a bolus  110 ′ of the liquid is chilled as it passes through the ice without much dilution. As shown in  FIG. 3A , the tube&#39;s bottom end may include a cover with one or more apertures  22   c ′ that serve as a splashguard, and the splashguard may be integrally formed with the tube or attached to the tube&#39;s bottom end. 
     Returning to the optional releasable fastening mechanisms between the topside of the rigid base&#39;s container section and the rigid top, either directly with the lower section or through the mounting ring, the fastening mechanism shown in  FIGS. 1B and 1F  is a type of bayonet mount  72  with tabs  84  extending from the mounting ring and elongated ridges  86  extending from the topside of the container section. The ridges preferably have a vertical segment and a horizontal segment; the horizontal segment hooks over the tabs, and the vertical segment acts as a stop to the rotation between the rigid top and the rigid bottom. It will be appreciated that the tabs could extend from the topside of the container section while the ridges extend from the mounting ring or directly from the lower section of the rigid top. Additionally, as with other bayonet mounts, the ridges could actually be a recessed groove or even a slot. As shown in  FIG. 3A , the threaded connection  74  has mating threads on the topside as well as on the mounting ring or the lower section which results in a threaded topside  88   a  for the container section and a threaded screw-on  88   b  for the rigid top. As shown in  FIGS. 4B and 4C , the snap-fit connection  76  has a lip  90  projecting radially outward from a recessed groove  92  around a circumference of the topside which engages and fits with a complementary mating shape around the circumference of the rigid top. Since the embodiment shown in  FIGS. 4B and 4C  preferably includes a bladder  30 , the snap-fit connection would also accommodate a flange  94  around the top of the bladder. The releasable fastening mechanism could alternatively be a friction-fit connection (or interference-fit) as is found in existing shaker containers, such as U.S. Pat. No. 300,867 which is incorporated by reference herein. 
     According to the various designs of the liquid dispenser according to the present invention, the rigid base, an open bladder  30   a  or a sealed bladder  30   b  can be situated within the container section of the rigid base. Preferably, the flange in the top of the open bladder is secured between the topside of the container section and the lower section of the rigid top. It will also be appreciated that with any one of the embodiments shown in the drawings, the rigid base may have a thin-film membrane  96   a  and/or a removable lid  96   b  that is attached to the topside of the container section and covers the open end in a sealed configuration. The thin film membrane and/or the removable lid is detached from the topside of the container section in an unsealed configuration. In the sealed configuration, the container section may contain a premix solution  98   a , a premix powder  98   b , or a premixed beverage  98   c . When a bladder is used with the liquid dispenser, the sealed bladder could also contain the premix solution  98   a , the premix powder  98   b , or the premixed beverage  98   c.    
     The bladder and/or the sealed container section can be a consumable item that contains the premixed beverage or may be a reusable part of the liquid dispenser. For example, as a reusable part of the liquid dispenser, the container sections of multiple rigid bases could be prefilled with a drink mixture, lids then cover the drink mixture, and the sealed container sections are refrigerated until they are needed. To use the prefilled rigid bases, the lid is simply removed from each one of the sealed container sections, and the unsealed container sections are connected to the rigid top as described above. It will be appreciated that the sealed bladder can be formed generally in the shape of the interior space of the rigid base, i.e, a form-fit bladder, and can have a thin-film membrane that seals the top. Alternatively, the sealed bladder may be formed as a pouch from plies of a flexible material that may be heat-welded together. The bladder may be large enough to fit the interior space of both the rigid top as well as the rigid base in which case the large bladder&#39;s volume (Vl b ) would almost equal to the volume of both to top and the base (V lb ≈V b +V t ). The large bladder would likely connect to the spout and could extend through the spout and have a flexible flange that is secured between the collar and the spout (not shown). The tube described above would not be used with the large bladder. 
     Various modifications can be made to the features of the invention as described above and as shown in the drawings without departing from the scope of the present invention. For example, as indicated above, the rigid base and rigid top preferably have a diameter that allows for a user to grasp around the container, but the container may have a larger diameter depending on the particular use. A larger container may have a handle connected to the rigid top and/or the rigid base. Additionally, it will be appreciated that alternative valves can be used with the liquid dispenser of the present invention. In addition to the stem-valve shown particularly shown in the drawings and described above, other valves may be used, such as various types of spring-biased tube-valves. 
     An example of a spring-biased tube valve is the stopper assembly that is described in the U.S. Pat. No. 600,901. The stopper assembly be incorporated into the dispenser of the present invention as a spring-biased tub valve and is hereby incorporated by reference herein as such. The shape of the tubular stem&#39;s tip would preferably be modified according to aspects of the invention described above. In particular, the valve opening in the &#39;901 Patent would preferably be modified to include slots, standoffs, or holes in the stem that would allow fluid to freely flow out of the stem when the valve is opened by pressing the tip of the stem flush against the bottom surface of the receptacle. As evident from the &#39;901 Patent, the length of the tube extending out from the collar (or stopper) can have a length that is greater than the collar. 
     As with the &#39;901 Patent, the nozzle assembly disclosed in U.S. Pat. No. 4,982,881 could also be used with the container of the present invention and is also hereby incorporated by reference herein. As described in the &#39;881 Patent, the spring-biased tube-valve can have a flange that engages with the top rim of the receptacle which pushes the valve open and allows the fluid to flow from the container through the nozzle&#39;s cylindrical tube into the tank. Similar to the &#39;881 Patent, adapters may optionally be used at the nozzle&#39;s discharge outlet for drinkware which have an opening that is smaller than the outlet&#39;s diameter. Generally, for each one of the push-open type of valves used for the liquid dispenser of the present invention, the inner portion of the valve is adjacent to the spout and the outer portion of the valve extends away from the spout. The outer portion of the valve moves toward the spout in an open position of the valve, and the outer portion of the valve moves away from the spout in a closed position of the valve. 
     The embodiments were chosen and described to best explain the principles of the invention and its practical application to persons who are skilled in the art. As various modifications could be made to the exemplary embodiments, as described above with reference to the corresponding illustrations, without departing from the scope of the invention, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. For example, although a shot glass is the preferred receptacle for use with the liquid dispenser of the present invention, it will be appreciated that other types of drinkware and other receptacles can be used with the liquid dispenser. Additionally, as evident from the description of the present invention, including the references incorporated by reference, the length of the valve stem, the valve tube, and the valve flange or any valve flange inserts at the end of the spout can be varied depending on the drinkware being used with the liquid dispenser. Similarly, the outer diameter of the valve flange and valve flange inserts can be varied depending on the drinkware. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.