Importance

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Abstract

A container comprises a sealed cavity defined by first and second walls of the container and a coolant disposed within the cavity wherein the coolant is capable of assuming first and second phases. A portion of the first wall is joined to the second wall wherein the portion includes an off-center opening. The portion is rupturable to limit pressure in the sealed cavity. The container further comprises a container rim and a lid having both an outer channel and a tab. The outer channel receives the container rim. The outer channel defines a first width. The tab has a second width substantially equal to the first width. When the coolant in the cavity is in the first phase there is a first interference fit of the channel with the container rim. When the coolant is in the second phase, there is a second interference fit, different than the first interference fit, between the container rim and the outer channel of the lid. A method of manufacture of such a container and lid is also disclosed.

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First Claim