Easy to Use & Strong Sealing - Wipe the lid and container edges to keep them completely dry before use, as moisture will cause the lid slip off. Then stretch the silicone food lid to make it cover on container, the good flexibility can easy to create an air-tight vacuum seal on the container to keep food fresh. (Note: Overstretched also will cause slip-off even tore.)
Safety BPA-free Silicone Materials - These silicone stretch lids are made of food-grade silicone material, non-toxic and odorless, harmless and safe to touch with food directly. Heat resistance from 40°F up to 450°F that is safe for use in the fridge, microwave, and dishwasher.
Durable & Reusable - These food-grade silicone container lids are super flexible and tear-resistance, durable for stretching repeatedly. They are also easy to clean, you can just rinse them with warm soapy water or throw them in the dishwasher. These rectangle silicone food lids are a perfect complement for the disposable plastic wrap which can help you save a lot!