| 摘要 |
A sealing lid is disclosed that includes a flexible annular closure membrane surrounded by a heavier annular rim member that is preferably adapted to hold the lid in place on a container to define a first position. The closure membrane can be axially flexed from the first position to a second position using a single hand. In the second position, the membrane axially depresses to lower down the pressure in the container and forms a hermetic vacuum seal with the container. The heavier rim member has a weight that is substantially greater than the weight of the membrane that is adapted to press down the lid over the container. The heavier rim member supports hermetic sealing by facilitating intimate contact between the lid and the container.
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