CPC B65D 51/1633 (2013.01) [B65D 43/0212 (2013.01); B65D 2543/00092 (2013.01); B65D 2543/00351 (2013.01); B65D 2543/00527 (2013.01); B65D 2543/00629 (2013.01); B65D 2543/0074 (2013.01)] | 19 Claims |
1. A container lid, comprising:
a flange configured to attach onto a top end of a container;
a lower portion extending inward and downward from the flange; and
an upper portion comprising a top portion and a peripheral portion between the top portion and the flange, the peripheral portion switchable between (i) a first state where the peripheral portion is deformed upward to raise the top portion from the lower portion with the flange attached to the top end of the container, and (ii) a second state where the peripheral portion is deformed downward to lower the top portion onto the lower portion with the flange attached to the top end of the container, the peripheral portion formed with one or more vent holes that are blocked by the lower portion in the second state but opened in the first state, the peripheral portion configured to automatically switch from the second state to the first state to release a gas within the container when pressure of the gas rises above a threshold.
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