Patent ID: 8365946

Claim:
A container assembly comprising: a bottle comprising: an interior; a neck finish; an upper rim defining an opening at a distal end of said neck finish; and a closure comprising: a closed top; a skirt fastened to said neck finish for closing said opening of said bottle; an active insert secured to an interior surface of said closed top, and housing at least one reactant; a liner bonded to said interior surface of said closed top to form a hermetic seal between said interior surface of said closed top and said rim of said bottle and to form an expansion chamber surrounding said active insert, said expansion chamber comprising: an elastic portion that expands from an unstretched condition to a stretched condition as pressure within said expansion chamber increases and then contracts from said stretched condition to said unstretched condition when pressure within said expansion chamber equilibrates with pressure of said interior of said bottle; a valve within said elastic portion that opens to release gas into said interior of said bottle as said pressure within said expansion chamber increases and then closes as said elastic portion contracts to said unstretched condition; wherein said at least one reactant is triggerable to a reaction by an external energy source to produce gas in said expansion chamber to increase pressure of said expansion chamber and to expand said elastic portion of said expansion chamber to open said valve through which said gas is released to said interior of said bottle.