100% BPA Free Silicone Material - These silicone stretch lids are made of food-grade silicone which is non-toxic and odorless, safe for touch with foods directly. It will be a perfect replacement for your long-lost container lids as well as convert any regular bowl to an on-the-go container.Flexible & Stretchable Food Container Lids - These silicone lids are super flexible and stretchy enough to fit various shapes of containers, like bowls, platters, dishes, jars, cans, mugs, etc. (Tips: Please make sure that the container size does not exceed the maximum stretchy size and the container edge is dry.)Reusable & Environmentally Friendly - Using this kind of silicone food lids, you will no need to repeatedly purchase expensive plastic wrap. They are washable as well as easy to be cleaned. Just rinse them with warm soapy water or throw them in dishwasher. (Tips: Please DON'T use abrasive or force-foam cleaners.)Ease of Use & Multi-useful - These reusable food lids are ideal for storing leftovers, they are easy to be stretched to fit different sizes or shapes containers. Perfect to create an air-tight vacuum seal on glass, plastic or metal containers to keep food fresh.Durable & Safe for Use - Fridge and microwave use safe, heat-resistance from 40F up to 400F. Not easily deformed and ensure long-lasting use. (Tips: Please DON'T fully sealing the container when heating food in the microwave, leave a gap will be fine.)