Jar lid

A jar lid is a metal or plastic cap that seals the opening of a jar to keep its contents fresh and prevent contamination. It often features a screw thread that matches the jar’s mouth, allowing it to be securely twisted on or off. Some lids include a rubber or silicone gasket to create an airtight seal, which is essential for preserving food. The design ensures the jar stays closed during storage and can be opened easily when needed, maintaining the quality and safety of the product inside.