Silicone vacuum tight lid – with new static free technology. The lids are dust resistant and have a Nylon rim. The lids come in three sizes that can fit on bowls or pots from 5. 75 to 9. 75 inches. Eco lid can also be used as a splatter screen guard in the microwave for steaming. It creates an airtight seal to keep food fresh and is also reusable – no more wasted plastic wrap or foil.. Bpa free. Japanese silicone. Dishwasher Safe