Self heating beverage cup

Abstract

A self heating beverage cup has a container portion adapted to hold a selected liquid. The container portion is double walled and has a water holding portion disposed between the walls along a top portion and a chemical holding portion disposed along a bottom portion. The water holding portion has two removable seals disposed on a bottom portion so that when removed, the water flows down to mix with a chemical in the chemical holding portion. The chemical is calcium oxide which releases heat when mixed with water. A string is provided to allow the user to remove the two removable seals by pulling therein. In one embodiment, a bladder is provided to contain the water. A metallic portion thermally connects the chemical holding portion to a portion of the container portion so that heat is transferred into the liquid therein.

1 . A self heating beverage cup comprising:
 a cup portion;   said cup portion having a double walled section;   a container portion disposed within said cup portion;   said container portion adapted to hold a liquid;   a water holding portion disposed within a portion of said double walled section;   said water holding portion being filled with water;   a chemical holding portion disposed in another portion of said double walled section;   said chemical holding portion being filled with a chemical; and   a valve means for selectively allowing said water to mix with said chemical whereby heat is produced.   
     
     
         2 . The self heating beverage cup according to  claim 1  wherein said valve means comprises at least one removable seal disposed on a bottom portion of said water holding portion. 
     
     
         3 . The self heating beverage cup according to  claim 2  further comprising a string attached to said at least one removable seal wherein when a user pulls on said string, said at least one removable seal is removed. 
     
     
         4 . The self heating beverage cup according to  claim 1  wherein said portion of said double walled section is disposed within a top portion therein. 
     
     
         5 . The self heating beverage cup according to  claim 4  wherein said another portion of said double walled section is disposed within a bottom portion therein. 
     
     
         6 . The self heating beverage cup according to  claim 1  wherein said chemical is a chemical that releases energy when mixed with water. 
     
     
         7 . The self heating beverage cup according to  claim 1  wherein said chemical is calcium oxide. 
     
     
         8 . The self heating beverage cup according to  claim 2  wherein said at least one removable seal is made of paper. 
     
     
         9 . The self heating beverage cup according to  claim 2  wherein said at least one removable seal is made from foil. 
     
     
         10 . The self heating beverage cup according to claim The self heating beverage cup according to  claim 1  further comprising a thermal transfer portion disposed between a portion of said chemical holding portion and said container portion whereby heat is transferred to a liquid introduced to said container portion. 
     
     
         11 . The self heating beverage cup according to  claim 1  wherein said self heating beverage cup is made of polystyrene foam. 
     
     
         12 . The self heating beverage cup according to  claim 1  further comprising a handle disposed on an outer perimeter of said cup. 
     
     
         13 . A self heating beverage cup comprising:
 a cup portion;   said cup portion having a double walled section;   a container portion disposed within said cup portion;   said container portion adapted to hold a liquid;   a water holding bladder disposed within a portion of said double walled section;   said water holding bladder being filled with water;   a chemical holding portion disposed in another portion of said double walled section;   said chemical holding portion being filled with a chemical; and   a valve means for selectively allowing said water to mix with said chemical whereby heat is produced.   
     
     
         14 . The self heating beverage cup according to  claim 13  wherein said valve means comprises at least one removable seal disposed on a bottom portion of said water holding bladder. 
     
     
         15 . The self heating beverage cup according to  claim 14  further comprising a string attached to said at least one removable seal wherein when a user pulls on said string, said at least one removable seal is removed. 
     
     
         16 . The self heating beverage cup according to  claim 13  wherein said portion of said double walled section is disposed within a top portion therein and said another portion of said double walled section is disposed within a bottom portion therein. 
     
     
         17 . The self heating beverage cup according to  claim 13  wherein said chemical is calcium oxide. 
     
     
         18 . The self heating beverage cup according to  claim 14  wherein said at least one removable seal is made of paper. 
     
     
         19 . The self heating beverage cup according to  claim 14  wherein said at least one removable seal is made from foil. 
     
     
         20 . The self heating beverage cup according to  claim 13  further comprising a thermal transfer portion disposed between a portion of said chemical holding portion and said container portion whereby heat is transferred to a liquid introduced to said container portion.