| 摘要 |
A lid for use in combination with a container having smooth inner walls includes a central portion and a flexible annular lip which contacts the inner walls of the container and provides a seal between the lid and the walls. The lip includes a notch therein which allows for the expulsion of air from between the lid and the contents of the container. In the closed position the lid floats in the surface of the container contents. A method for preserving the contents of a container employing this lid.
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