Patent Publication Number: US-2018044106-A1

Title: A capsule for storing a substance in a disposable cup and uses thereof

Description:
FIELD OF THE INVENTION 
     The present invention relates accessories for disposable dishware. More particularly, the present invention relates to capsules for storing a substance in disposable cups. 
     BACKGROUND OF THE INVENTION 
     Solid and liquid substances for the preparation of an instant beverage or food dose, for example coffee powder, instant soup power, chopped and dried tea leaves, instant potato puree powder and the like are available and widely used. The beverage or food dose is prepared by adding a liquid, for example water or milk, to a dish containing the substance and dissolving, suspending or extracting the substance in the liquid. In order to enhance the simplicity and speed of the preparation of such instant beverages or food doses, attempts are made to provide instant dishes, for example instant cups, pre-filled with a substance for the preparation of an instant beverage or food dose. 
     For example, United States patent application No. 2006/0096462 A1 discloses a disposable cup having a floor to which there is affixed a cake of water-soluble flavoursome material to dissolve when water is added to the cup. The water-soluble flavoursome material that is affixed to the floor of the disposable cup is not covered and therefore vulnerable to exposure to oxygen and moisture that adversely affect the freshness of the water-soluble flavoursome material. Furthermore, the water-soluble flavoursome material undergoes artificial treatments in order to solidify it to form a cake and to affix it to the floor of the disposable cup. This may prevent usage of this disposable cup by some potential consumers, for example those who avoid consuming artificially-treated beverages and foods. In addition, this disposable cup may not be marketed in countries where there are regulations preventing the marketing of unpacked beverages and foods, since the cake of water-soluble flavoursome material is not covered or packaged. Furthermore, covering the water-soluble flavoursome material with a cover inside the cup would not allow stacking of a plurality of such disposable cups in a maximal compactness, for example in a manner similar to the stacking of disposable cups without a material and/or a cover inside them. This may increase the space these cups occupy during storage and delivery, and thereby influence the costs of delivery which eventually increase the price of the product. 
     Another approach which does not involve solidification of the beverage or food substance, but rather involves covering the substance with a cover permeable to liquid, is disclosed for example in the following publications. Chinese utility model No. 2564505 Y discloses a paper tea cup with an interlayer on the bottom of the main body of the paper tea cup. Dry powders of a soluble beverage, such as tea, coffee and milk powders, can be appropriately placed in the interlayer, and the interlayer is made of strong filterable material including non-woven fabrics. A beverage can be instantly brewed in the paper tea cup without having to add additional beverage, thus bringing more convenience and practicality to the usage of a paper tea cup. In addition, Chinese utility model No. 200981738 Y discloses a disposable water cup, wherein the bottom of a cup body is placed with tea, the top of the tea is provided with a layer of filter paper which is ventilating and permeable, and the periphery of the filter paper is fixed on the cup wall near the bottom of the cup. The tea can be replaced by other edible infusing things, such as coffee, milk powder, fruit juice powder and so on. These approaches involve the coverage of the substance on the bottom of the disposable cup with a cover permeable to liquid. During the preparation and consumption of the beverage the cover remains in the disposable cup—a characteristic that may prevent the usage of this type of product by potential consumers, for example those who may be concerned about the possibility that the cover may be released from the bottom of the disposable cup during consumption of the beverage. Furthermore, since the cover is permeable to liquid it does not block the passage of oxygen and moisture that might adversely affect the freshness of the material that is stored in the disposable cup. In addition, the presence of the cover in the disposable cup does not allow a compact stacking of a plurality of such disposable cups, as discussed above. 
     A solution for the issue of the presence of a cover in the disposable cup that covers the beverage or food substance and still remains in the disposable cup during consumption of the beverage or food, is provided for example by Chinese utility model No. 2687065, which discloses a paper cup and a charging interlayer positioned in the paper cup in which a material for the preparation of a beverage, such as instant coffee, powdered milk, malted milk and tea, is stored. The charging interlayer is made of an edible starch paper. Therefore, when water is added to the cup, the charging interlayer dissolves and allows mixing of the beverage material with the water. The presence of an edible starch paper in the paper cup and its consumption by the user after being dissolved in the beverage prepared in the paper cup, may prevent the usage of this type of product by potential consumers, for example those who may be concerned about consuming edible paper. Furthermore, starch paper does not block the passage of oxygen and moisture that might adversely affect the freshness of the material that is stored in the paper cup, and the presence of the charging interlayer in the paper cup does not allow a compact stacking of a plurality of such paper cups, as discussed above. 
     Another approach that is commercially available, is a capsule attached to a disposable cup, the capsule comprises a cover, and a beverage or food substance is stored in the capsule. Before usage, the cover of the capsule is removed, and a liquid is poured into the disposable cup. Similarly, Chinese utility model No. 2606080 Y discloses a cup comprising a cup body, a cup bottom, and a chamber that is formed between the cup body and the cup bottom, and a support frame is arranged at the place which is around the chamber and clings to the inner wall of the chamber, wherein a seal membrane is covered upon the support frame; the chamber positioned on the lower part of the cup is filled with a quantitative instant drink, such as coffee, powdered milk, fruit powder, instant tea and composite instant drink. Before usage, the seal membrane is teared off and water is poured into the cup. Even though this approach may solve the problem of avoiding exposure of the substance to oxygen and moisture if an appropriate seal membrane is used, it still does not address the issue of hesitation of using this product by potential consumers due to the presence of a capsule or a chamber in the beverage or food dose during consumption, and the inability to compactly stack a plurality of disposable cups harboring a capsule or chamber in them, as discussed in detail above. 
     Thus, there is a need for a disposable cup containing a substance for the preparation of a beverage or food dose that allows an easy, fast and convenient preparation of the beverage or food dose, keeps the freshness of the substance for an extended period of time, and further allows stacking of a plurality of disposable cups that contain the substance in a stack, in maximal compactness, for example in a manner similar to the stacking of disposable cups without a substance inside them. The currently available solutions, demonstrated in the aforementioned publications, do not address this need. 
     SUMMARY OF THE INVENTION 
     Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described below. In case of conflict, the patent specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting. 
     According to one aspect of the present invention, there is provided a capsule for enclosing a substance on a bottom of a first disposable cup comprising a bottom and a rim deformed from the bottom of the first cup, the capsule comprising: a bottom having a circumference; a wall extending from the circumference; and an opening, wherein the capsule is configured to be accommodated in a space defined by the bottom and the rim of a second disposable cup inserted inside the first disposable cup. 
     According to one embodiment, the capsule further comprises a margin extending outwards from an edge of the wall. 
     According to another embodiment, the capsule further comprises at least one handle attached to the wall. 
     According to yet another embodiment, the capsule further comprises at least one handle attached to the margin. 
     According to still another embodiment, at least part of the margin is configured to be accommodated in a slot in the lower part of the first disposable cup. 
     According to yet another embodiment, the slot in the first disposable cup is substantially 1 mm deep. 
     According to a further embodiment, the capsule further comprises a slot near an edge of the wall, wherein the capsule&#39;s slot is configured to accommodate a protrusion along the wall of the first disposable cup substantially near a bottom of the first disposable cup. 
     According to yet a further embodiment, the at least one handle is hollow. 
     According to still a further embodiment, the capsule further comprises at least one inner wall which divides the capsule to at least two sub-compartments. 
     According to an additional embodiment, the capsule further comprises a first compartment and a second compartment, wherein the first compartment is configured to face the bottom of a disposable cup in which the capsule is placed, and the second compartment is configured to face an inner space of the disposable cup. 
     According to yet an additional embodiment, the second compartment is covered with a cover. 
     According to still an additional embodiment, the cover is made of an oxygen and moisture proof material. 
     According to one embodiment, the capsule is further covered with a liquid permeable cover. 
     According to another aspect of the present invention, there is provided a system comprising a stack of a plurality of disposable cups, comprising a bottom and a rim deformed from the bottom, and a plurality of capsules comprising a bottom having a circumference, a wall extending from the circumference and an opening, wherein each of the capsules is accommodate in a space defined by the bottom and the rim of a disposable cup. 
     According to one embodiment, the plurality of capsules are configured to avoid exposure of a substance enclosed by the plurality of capsules to oxygen and moisture. 
     According to a further aspect of the present invention, there is provided a method for stacking a plurality of disposable cups, comprising a bottom and a rim deformed from the bottom, and a plurality of capsules comprising a bottom having a circumference, a wall extending from the circumference and an opening, and a substance enclosed by the capsules, the method for stacking comprising: positioning a disposable cup with the bottom and rim pointing upwards; providing a capsule with the opening pointing upwards in a space formed by the bottom and rim of the disposable cup; providing a substance into the capsule; covering the capsule with another disposable cup with the bottom and rim pointing upwards; repeating the previous steps from the step of providing a capsule with the opening pointing upwards in a space formed by the bottom and rim of the disposable cup, until a stack with a desired number of disposable cups, capsules and substance is formed. 
     According to an additional aspect of the present invention, there is provided a method for keeping the freshness for an extended period of time of a substance packaged in a stack of a plurality of disposable cups, comprising a bottom and a rim deformed from the bottom, and a plurality of capsules comprising a bottom having a circumference, a wall extending from the circumference and an opening, wherein each of the capsules is accommodate in a space defined by the bottom and the rim of a disposable cup, the method for keeping the freshness comprises: packaging the stack in a package made of an oxygen and moisture proof material. 
     According to one embodiment, the method for keeping the freshness for an extended period of time of a substance packaged in a stack of a plurality of disposable cups further comprises applying an inert gas into the package. 
     According to another embodiment, the inert gas is nitrogen. 
     According to yet another embodiment, the method for keeping the freshness for an extended period of time of a substance packaged in a stack of a plurality of disposable cups further comprises creating a negative pressure in the package. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments are herein described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments, and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the embodiments. In this regard, no attempt is made to show structural details in more detail than is necessary for a fundamental understanding, the description taken with the drawings making apparent to those skilled in the art how several forms may be embodied in practice. 
       In the drawings: 
         FIG. 1  schematically illustrates, according to an exemplary embodiment, a cross-section view of a prior art disposable cup adapted to contain warm or cold beverages or foods. 
         FIG. 2A  schematically illustrates, according to an exemplary embodiment, a cross-section view of a disposable cup and a capsule enclosing a substance on the bottom of the disposable cup. 
         FIG. 2B  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule further comprising at least one handle, placed on a bottom of a disposable cup. 
         FIG. 3  schematically illustrates, according to an exemplary embodiment, a cross-section view of a system comprising a stack of a plurality of disposable cups. 
         FIG. 4  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule comprising a slot near the edge of the wall of the capsule, positioned on a bottom of a disposable cup comprising a protrusion along the wall of the disposable cup near the bottom of the disposable cup. 
         FIG. 5  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule positioned on a bottom of a disposable cup, which comprises a slot in the lower part of the disposable cup&#39;s wall, which is configured to accommodate at least part of the margin of the capsule. 
         FIG. 6  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule comprising at least one hollow handle. 
         FIG. 7  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule comprising two inner walls that divide the capsule to three sub-compartments. 
         FIG. 8  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule comprising a first compartment configured to face a bottom of a disposable cup and a second compartment facing an inner space of the disposable cup, while the first compartment further comprises an inner wall which divides the first compartment to two sub-compartments. 
         FIG. 9  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule covered with a liquid permeable cover. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Before explaining at least one embodiment in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be regarded as limiting. In discussion of the various figures described herein below, like numbers refer to like parts. The drawings are generally not to scale. 
     For clarity, non-essential elements were omitted from some of the drawings. 
     One aim of the present invention is to provide a capsule configured to enclose a substance placed on a bottom of a disposable cup. 
     Another aim of the present invention is to provide a capsule configured to enclose a substance placed on a bottom of a disposable cup that enables compact stacking of a plurality of disposable cups accommodating the capsule in a manner similar to the stacking of empty disposable cups. 
     Yet another aim of the present invention is to provide a capsule configured to enclose a substance placed on a bottom of a disposable cup that enables keeping the freshness of the substance for a substantially extended period of time. 
     The present invention provides an open capsule that is suitable for usage with typical disposable cups which are adapted to contain warm or cold beverages or foods.  FIG. 1  schematically illustrates, according to an exemplary embodiment, a cross-section view of a prior art disposable cup  100  adapted to contain warm or cold beverages or foods, for example a disposable cup  100  made of paper. A disposable cup  100  comprises a cup wall  110 , essentially, but not necessarily, in the form of a truncated cone, and a bottom  120 , for example in the form of a disk. The inner surface of the wall  110  and the bottom  120  of the disposable cup  100  are typically coated with a thin layer of a waterproof material (not shown), for example polyethylene, configured to avoid leakage of liquid through the wall  110  and bottom  120  of the disposable cup  100 . In addition, the bottom  120  is deformed to provide a rim  130 , configured to provide stability to the disposable cup  100  when it is standing on a surface. According to some embodiments, the height of the rim  130  of a disposable cup  100  is in the range of substantially 4-8 mm. The rim  130  and the bottom  120  of the disposable cup  100  both define a space  140  under the bottom  120  of the disposable cup  100 . 
     The present invention provides a capsule configured to be accommodated in the space  140  defined by the bottom  120  and the rim  130  of the disposable cup  100 . 
     It should be noted that the disposable cup  100  that is illustrated in  FIG. 1  is only an exemplary embodiment of a disposable dish to which the capsule of the present invention fits. The capsule of the present invention is configured to fit any disposable dish known in the art, which comprises a rim deformed from the bottom of the disposable dish, for example but not limited to, a disposable bowl containing instant soup powder, and disposable mug containing dried noodles and sauce powder, and the like. Therefore, for the sake of convenience only, the term “disposable cup” is used throughout the description and claims of the present application. However, it should be appreciated that the meaning of the term “disposable cup” refers to any disposable dish having a rim deformed from the bottom of the disposable dish, as illustrated in  FIG. 1 . 
       FIG. 2A  schematically illustrates, according to an exemplary embodiment, a cross-section view of a disposable cup  100  and a capsule  1  enclosing a substance  500  on the bottom  120  of the disposable cup  100 . The substance  500  is any substance known in the art for the preparation of a beverage or food dose, for example a solid substance, a powdered substance and a liquid substance. Example of such a substance  500  include, but not limited to, coffee powder, chopped and dried tea leaves, instant soup powder, dried noodles, instant potato puree powder and the like. According to one embodiment, the capsule  1  comprises a bottom  10  having a circumference (not shown), a wall  20  and an opening  30 . 
       FIG. 3  schematically illustrates, according to an exemplary embodiment, a cross-section view of a system  200  comprising a stack of a plurality of disposable cups  100 , where a capsule  1  is accommodated in each space  140  defined by a bottom  120  and a rim  130  of each one of the disposable cups  100 . As illustrated in  FIG. 3 , the capsules  1  allow compact stacking of the plurality of disposable cups  100  in a manner similar to the stacking of a plurality of disposable cups  100  without the capsules  1 . 
     According to one embodiment, the structure and diameter of the bottom  10  of the capsule  1  is similar to the structure and diameter of the bottom  120  of the disposable cup  100 , and the wall  20  of the capsule  1  has a structure and height similar to the structure and height of the rim  130  of the disposable cup  100 . According to another embodiment, the diameter of the bottom  10  of the capsule  1  is somewhat shorter than the diameter of the bottom  120  of the disposable cup  100  in order to facilitate insertion of the capsule  1  into the space  140  defined by the bottom  120  and rim  130  of the disposable cup  100 . For example, the diameter of the bottom  10  of the capsule  1  is substantially 1 mm shorter than the diameter of the bottom  120  of the disposable cup  100 . According to yet another embodiment, the height of the wall  20  of the capsule  1  is lower than the height of the rim  130  of the disposable cup  100 . 
     As may be appreciated from  FIG. 3 , when a capsule  1  is accommodated in the space  140  defined by the bottom  120  and rim  130  of a disposable cup  100 , an inner surface of a bottom  120  of a disposable cup  100  serves as a cover for the capsule  1  with which it is in contact. Thus, a substance  500  that is enclosed by the capsules  1  in the stack of a plurality of disposable cups  100  is well packaged in a manner that does not expose the substance  500  to oxygen and moisture, thus extending the shelf life of the substance  500 , or in other words—keeps the substance  500  fresh for an extended period of time. 
     It should be noted that keeping the substance  500  fresh for an extended period of time means keeping the substance  500  fresh for a period of substantially a year. Any means for eliminating exposure of the substance  500  to oxygen and moisture is under the scope of the present invention, including but not limited to, making the disposable cup  100  and/or the capsule  1  of a material that is oxygen and moisture proof; removal of air from, and creating a negative pressure in, the interior of the capsule  1  that is covered by the bottom  120  of the disposable cup  100  or in a package comprising a stack of a plurality of disposable cups  100  and capsules  1  enclosing a substance  500 ; and providing nitrogen, or any other suitable gas, into the interior of the capsule  1  that is covered by the bottom  120  of the disposable cup  100  or into a package comprising a stack of a plurality of disposable cups  100  and capsules  1  enclosing a substance  500 . In addition, occupation of the interior of the capsule  1  that is covered by the bottom  120  of the disposable cup  100  with which it is in contact, with a substance  500  decreases the amount of oxygen and moisture trapped in the interior of the capsule  1 , thus also contributing to the freshness of the substance  500  during storage. 
     Furthermore, it should be noted that all the materials of which the disposable cup  100  and the capsule  1  of the present invention are made of are food grade and heatproof, thus enabling their usage in the storage of beverage and food substances, as well as preparation of cold and hot beverages or food doses. 
     Returning now to  FIG. 2A , according to yet another embodiment, the capsule  1  further comprises a margin  40  extending outwards from the edge of the wall  20  of the capsule  1 . In a stack of disposable cups  100  with capsules  1 , as illustrated in  FIG. 3 , the lower edge of a rim  130  of a disposable cup  100  presses the margin  40  of the capsule  1  with which it comes in contact towards the bottom  120  of the disposable cup  100 , and thus seals the interior of the capsule  1  and prevents exposure of a substance  500  enclosed by the capsule  1  to oxygen and moisture. According to still another embodiment, during a packaging process of a plurality of disposable cups  100 , capsules  1  and substance  500  in a stack, the margin  40  of the capsule  1  may be adhered to the bottom  120  of the disposable cup  100  with which it is in contact in order to increase and stabilize the sealing of the interior of the capsule  1 . The adherence of the capsule&#39;s  1  margin  40  to the bottom  120  of the disposable cup  100  may be performed in any method known in the art, for example welding, adhering with a food grade adhesive and the like. 
     There are several ways to eliminate exposure of a substance present inside the capsule  1  to oxygen and moisture. According to one embodiment, the capsule  1  is made of an oxygen and moisture proof material, for example plastic or aluminum foil. According to another embodiment, the inner surface of the capsule  1  is covered with a layer made of an oxygen and moisture proof material. According to yet another embodiment, the disposable cup  100 , or at least the bottom  120  of the disposable cup  100 , which serves as a cover of the capsule  1  in a stack of disposable cups  100  and capsules  1 , is made of an oxygen and moisture proof material. According to still another embodiment, both surfaces of the bottom  120  and the inner surface of the rim  130  of the disposable cup  100  that face the space  140  in which the capsule  1  is accommodated, is made of an oxygen and moisture proof material, or covered with a layer of an oxygen and moisture proof material. According to a further embodiment, the stack of disposable cups  100  and capsules  1  harboring a substance  500  is packaged with a packaging material that is oxygen and moisture proof, for example an aluminum laminate. According to yet a further embodiment, vacuum, or negative pressure, may be applied in the package of disposable cups  100  and capsules  1  in order to reduce the amount of oxygen and moisture inside the package. 
       FIG. 2B  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  further comprising at least one handle  50 , placed on a bottom  120  of a disposable cup  100 . According to a preferred embodiment, the capsule  1  further comprises at least one handle  50  configured to facilitate removal of the capsule  1  from the disposable cup  100  before pouring a liquid into the disposable cup  100 , in order to prepare a beverage or food dose with a substance  500  that was enclosed by the capsule  1  in the disposable cup  100 . According to one embodiment, the at least one handle  50  extends from the edge of the wall  20  of the capsule  1 . According to another embodiment, the at least one handle  50  is attached to the edge of the wall  20  of the capsule  1  in a flexible manner, thus enabling folding of the at least one handle  50  relative to the capsule  1 . According to another embodiment, the length of the at least one handle  50  is at least similar to the height of a wall  110  of disposable cup  100 . According to a preferred embodiment the length of the at least one handle  50  is slightly higher than the height of a wall  110  of a disposable cup  100 . According to another preferred embodiment, the length of the at least one handle  50  is higher in a range of substantially 1-2 mm than the height of a wall  110  of a disposable cup  100 . Thus, when a capsule  1  is positioned on a bottom  120  of a disposable cup  100 , the at least one handle  50  protrudes above the wall  110  of the disposable cup  100  in a manner that facilitates grasping the at least one handle  50  by a user and removing the capsule  1  from the disposable cup  100 . According to a further embodiment, the width of the at least one handle  50  is such that it does not interfere with the stacking of a plurality of disposable cups  100  and capsules  1  comprising a handle  50 . According to a preferred embodiment, the width of the at least one handle  50  is substantially 0.5 mm, which is slightly lower that the space between disposable cups  100  in a stack of a plurality of disposable cups  100 . According to yet a further embodiment, after removal of the capsule  1  from the disposable cup  1  the at least one handle  1  may be used as a stirrer during the preparation of a beverage or food dose in the disposable cup  100 . Accordingly, the at least one handle  50 , and according to some embodiments also the capsule  1 , is made of a food grade and heatproof material. 
       FIG. 4  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  comprising a slot  25  near the edge of the wall  20  of the capsule  1 , positioned on a bottom  120  of a disposable cup  100  comprising a protrusion  117  along the wall  110  of the disposable cup  100  near the bottom  120  of the disposable cup  100 . According to one embodiment, the slot  25  of the capsule  1  is configured to accommodate the protrusion  117  of the disposable cup  100 , thus a further sealing of the interior of the capsule  1  is achieved, as well as stability of the capsule  1  when positioned in the disposable cup  100 . According to another embodiment, the protrusion  117  of the disposable cup  100  is removably attached to the wall  110  of the disposable cup  100 . Thus, during the packaging process, after enclosing a substance  500  by the capsule  1 , the slot  25  of a capsule  1  is adhered to a protrusion  117  of a disposable cup  100 , in any manner known in the art, for example welding, adhering with a food grade adhesive and the like. Thus, before usage, removal of the capsule  1  from the disposable cup  100  causes removal of the protrusion  117  from the wall  110  of the disposable cup  100  while still adhered to the slot  25  of the capsule  1 . In this manner the protrusion  117  does not remain in the disposable cup  100  when a beverage or food dose is prepared in the disposable cup  100 . 
       FIG. 5  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  positioned on a bottom  120  of a disposable cup  100 , which comprises a slot  115  in the lower part of the disposable cup&#39;s  100  wall  110 , which is configured to accommodate at least part of the margin  40  of the capsule  1 . According to one embodiment, the slot  115  is substantially 1 mm deep. According to another embodiment, the diameter of the open side of the capsule  1  together with the margin  40  is slightly longer, for example in substantially 1 mm, that the diameter of the disposable cup  100  where the slot  115  is made. When at least part of the margin  40  of the capsule  1  is inserted in the slot  115 , a further sealing of the interior of the capsule  1  is achieved, as well as stability of the capsule  1  when positioned in the disposable cup  100 . 
       FIG. 6  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  comprising at least one hollow handle  52 . According to this embodiment, the space  55  inside the at least one hollow handle  52  is configured to harbor a substance that may be added to substance  500  enclosed by the capsule  1  during the preparation of a beverage or a food dose in a disposable cup  100 . For example, the capsule  1  may enclose an instant soup powder and a hollow handle  52  may contain in its space  55  a spice, like pepper, that the user may add to the soup when prepared in the disposable cup  100 . 
     According to still another embodiment, the capsule comprises at least one inner wall  15  that divides the capsule  1  to at least two sub-compartments  16 .  FIG. 7  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  comprising two inner walls  15  that divide the capsule to three sub-compartments  16 . The at least two sub-compartments  16 , or three sub-compartments  16  of the capsule  1 , as exemplarily illustrated in  FIG. 7 , are configured to harbor at least two substances  500 , or three substances  502 ,  504  and  506 , as exemplarily illustrated in  FIG. 7 , which are separated from each other, for example coffee powder, sugar and dried milk powder. More particularly, the at least two sub-compartments  16  of the capsule  1  are configured to harbor substances  500  that cannot be mixed together for an extended period of time during the storage period of the disposable cups  100  and the substances  500  inside them, which are enclosed by capsules  1 . 
     According to a further embodiment, the capsule  1  comprises a first compartment  60  and a second compartment  70 , when the first compartment is configured to face the bottom  120  of a disposable cup  100  in which the capsule  1  is placed, and the second compartment  70  is configured to face an inner space of a disposable cup  100 . According to yet a further embodiment, the first compartment  60  and/or the second compartment  70  of the capsule further comprises at least one inner wall that further divides the first compartment  60  and/or the second compartment  70  to at least two sub-compartments.  FIG. 8  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  comprising a first compartment  60  configured to face a bottom  120  of a disposable cup  100  and a second compartment  70  facing an inner space of the disposable cup  100 , while the first compartment  60  further comprises an inner wall  65  which divides the first compartment  60  to two sub-compartments  67 . Each compartment  60 ,  70  and sub-compartment  67  is configured to harbor a separate substance  500 ,  504  and  506  as discussed above. According to an additional embodiment, the second compartment is removably covered with a cover  77 , preferably made of an oxygen and moisture proof material, like plastic and aluminum foil, in order to avoid exposure of the at least one substance  506  placed in the second compartment  70  to oxygen and moisture. During usage, the user may decide whether to add the at least one substance  506  stored in the second compartment  70  to the beverage or food dose that is prepared in the disposable cup  100  with the at least one substance  502  and  504  that was enclosed by the first compartment  60  of the capsule  1 . 
       FIG. 9  schematically illustrates, according to an exemplary embodiment, a cross-section view of a capsule  1  covered with a liquid permeable cover  80 . According to one embodiment the capsule  1  which covered with a liquid permeable cover  80  is configured to enclose a substance  500  that is to be extracted with a liquid in a disposable cup  100 , for example chopped and dried tea leaves, and allowing removal of the substance  500  from the liquid after the extraction. The liquid permeable cover  80  is made of a material that allows passage of liquid therethrough, for example fabric, porous plastic and the like. During usage, a liquid, for example hot water, is poured into a disposable cup  100  harboring a capsule  1  covered with a liquid permeable cover  80 , and a substance  500  enclosed by the capsule  1  is extracted by the added liquid. Before consuming the extracted beverage the capsule  1  may be removed from the disposable cup  1 . If according to some embodiments, the capsule  1  covered with a liquid permeable cover  80  further comprises a handle  50 , a user may hold the handle  50  and immerse the capsule  1  several times in a liquid poured into the disposable cup  100  in order to facilitate the extraction of the substance  500  enclosed by the capsule  1 . According to an additional embodiment, the liquid permeable cover  80  is attached to the edge of the wall  20  or the margin  40  of the capsule  1 , in a manner that keeps the liquid permeable cover  80  attached to the edge of the wall  20  or the margin  40  of the capsule  1  when it comes in contact with a liquid, particularly warm or hot liquid. For example, the liquid permeable cover  80  may be welded, or adhered with a waterproof food grade adhesive to the edge of the wall  20  or to the margin  40  of the capsule  1 . 
     According to one embodiment, a method for stacking a plurality of disposable cups, comprising a bottom and a rim deformed from the bottom, and a plurality of capsules comprising a bottom having a circumference, a wall extending from the circumference and an opening, and a substance enclosed by the capsules, the method for stacking comprising: positioning a disposable cup with the bottom and rim pointing upwards; providing a capsule with the opening pointing upwards in a space formed by the bottom and rim of the disposable cup; providing a substance into the capsule; covering the capsule with another disposable cup with the bottom and rim pointing upwards; repeating the previous steps from the step of providing a capsule with the opening pointing upwards in a space formed by the bottom and rim of the disposable cup, until a stack with a desired number of disposable cups, capsules and substance is formed. 
     According to another embodiment, a method for keeping the freshness for an extended period of time of a substance packaged in a stack of a plurality of disposable cups, comprising a bottom and a rim deformed from the bottom, and a plurality of capsules comprising a bottom having a circumference, a wall extending from the circumference and an opening, wherein each of the capsules is accommodate in a space defined by the bottom and the rim of a disposable cup, the method for keeping the freshness comprises: packaging the stack in a package made of an oxygen and moisture proof material. According to yet another embodiment, the method further comprises applying an inert gas into the package, for example nitrogen. 
     According to yet another embodiment, the method for keeping the freshness for an extended period of time of a substance packaged in a stack of a plurality of disposable cups further comprises creating a negative pressure in the package, for example by extracting the air from the package and creating a vacuum in the package. 
     It should be noted that packaging a stack of disposable cups harboring a substance, and either applying an inert gas in the package or creating a negative pressure in the package, without using capsules of the present invention is not efficient in term of keeping the substance fresh for an extended period of time, because there is still air entrapped in the space defined by the bottom an d rim of a disposable cup. On the other hand, using capsules of the present invention is efficient in terms of keeping the substance fresh for an extended period of time because enclosing the substance with the capsule substantially decreases the amount of air entrapped n the space defined by the bottom an d rim of a disposable cup. 
     It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub combination. 
     Although the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the appended claims.