Cool Cup

Abstract

A Cool Cup comprises an open top beverage volume, a sealable chiller volume and an end seal adapted to make a water tight seal with said chiller volume. The interior wall of said beverage volume is substantially cylindrical. The exterior vertical wall of said chiller volume is also substantially cylindrical. The diameter of the chilling volume is at least 60% of the diameter of the Cool Cup. The top of said chiller volume is a rounded dome shape. Ice and optionally cold water may be added to the chiller volume to help cool a beverage and keep it at a constant preferred serving temperature. The ice can be immediately replenished if it melts by removing the end cap, dumping the melted water and adding new ice. Thus a Cool Cup can be used all day without having to be refrozen.

What I claim is: 
     
         1 . An open top personal beverage container, wherein said beverage container comprises a beverage volume, a chiller volume and an end cap adapted to make a water tight seal with said chiller volume wherein:
 a. the interior wall of said beverage volume is substantially cylindrical;   b. the exterior wall of said chiller volume is substantially cylindrical; and   c. wherein the diameter of said cylindrical exterior wall of said chiller volume is at least 60% of the diameter of said cylindrical interior wall of said beverage volume.   
     
     
         2 . The open top personal beverage container of  claim 1  wherein the top of said chiller volume is at least 1½ inches below the rim of said beverage volume. 
     
     
         3 . The open top personal beverage container of  claim 1  wherein the top of said chiller volume is a rounded dome shape. 
     
     
         4 . The open top personal beverage container of  claim 1  wherein said end cap comprises polypropylene or polyethylene and said end cap comprises a sealing surface for sealing to a corresponding sealing surface in said chiller volume. 
     
     
         5 . The open top personal beverage container of  claim 1  which further comprises a removable lid. 
     
     
         6 . The open top personal beverage container of  claim 5  wherein said removable lid is a plastic lid. 
     
     
         7 . The open top personal beverage container of  claim 1  wherein said container is a stein.