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A lid, also known as a cap, is part of a container, and serves as the cover or seal, usually one that completely closes the object. A lid is often a type of closure.
History
Lids have been found on pottery dating back as far as 3100 BC. Ancient Egyptian canopic jars with lids held the organs of mummified bodies as early as 2686 BC. The coffee lid market is valued at roughly $180 million. An estimated 14 billion lids were sold in 2009 in the United States.
Some containers such as tubs or jars now have a plastic film heat sealed onto the container: this is often called a lidding film.
References
Lid (container) Wikipedia(Text) CC BY-SA