Patent ID: 8783244

Claim:
A container adapted to change the temperature of a comestible substance contained therein, comprising: an outer body, said outer body comprising a plurality of sidewalls which together define a recess; a receptacle adapted to store the comestible substance, said receptacle is disposed in the recess and coupled to the outer body to form a chamber between the receptacle and the outer body, wherein at least a portion of the chamber substantially surrounds the receptacle; a barrier positioned within the chamber to divide the chamber into a first and a second compartment, wherein each compartment is adapted to receive one or more chemical reactant, the barrier comprising a stationary barrier member and a movable barrier member, the stationary barrier member being substantially fixed relative to the outer body, said stationary barrier member having a fixed sized opening, said movable barrier member being removably attached to the stationary barrier member and adapted to seal the opening; and a centering element comprising a plurality of centering members, the plurality of centering members configured to be positioned in proximity to the opening, wherein the centering element is configured to facilitate alignment of the stationary barrier member and the movable barrier member; wherein when a predetermined threshold force is applied to a preselected area on the container and the force is directed from an exterior of the container to an interior of the container, the movable barrier member separates from the stationary barrier member in a manner such that the movable barrier member is completely detached from the stationary barrier member, resulting in the entire fixed sized opening being uncovered, thus allowing one or more chemical reactants to flow from one chamber to the other at a predictable rate, wherein pressure from the out-flowing chemical reactants pushes the movable barrier member away from the opening to substantially inhibit the movable barrier member from blocking portions of the opening; and wherein a reaction involving the chemical reactants causes the temperature of the comestible substance to change.