100% BPA Free Silicone Material - This silicone stretch lids are made of food grade silicone which is non-toxic and odorless, safe for touch with foods directly. This will be a perfect replacement for your long-lost container lids as well as convert any regular bowl to an on-the-go container.Durable & Stretchable - These silicone lids are super flexible that is can be stretched about 0.8 inch longer, stretchy enough to fit various shape of food 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 to have good user experience)Eco-friendly Reusable - Using this kind of silicone food covers, 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 a dishwasher.Easy to Use & Strong Sealing - Featured with pull tabs, easy to be stretched to fit different sizes or shapes containers. Perfect to create an air-tight vacuum seal on almost anything to keep in fresh!Cold & Heat Resistance - Fridge-safe as well as microwave-safe, heat-resistance from 40F up to 400F. Not easily deformed and ensure long lasting use. (Tips: Please DON'T full sealing the container when you use in microwave, leave a gap will be fine.)