"Loose Silicone Stretch Lids Reuseable Microwave Safe Flexible Covers (Set of 6) Stretch lids are made of durable silicone which provide strongly stretchable to fit odd shape and size container, perfect For Rectangle, Round, Square Bowls, Dishes, Plates, Cans, Jars, Glassware & Mug. Approved dishwasher, freezer and microwave. Due to the good sealing, food covers allow bowls, cups or other containers to side lay or stack up for saving the space in a freezer. Bowl lids can used for covering the tableware needed to be heated in a microwave or oven. Product features Safety silicon : The silicone stretch lids used food grade material, non-toxic, durable ,soft texture, which is 100% Phthalate, Lead, Plastic and BPA free without worrying about yours and your family's health.Ensure Food Safety :The silicone stretch lids help you prevent spills to make the residual fruits, vegetables, drinks and other foods keep fresh or avoid foods from spattering in microwave oven.Eco-friendly :Silicone is a reusable, durable material. The silicone stretch lids, can reuse it multiple times, helps you say goodbye to the conventional cling wrap and the zipper storage bags.How To Use :Place half of the lids over one edge of the container.Start on the side closet to your body.Stretch the other half of the lid away from you,inching your way around the bowl.Stretch,then press the top of the lid while pulling the tabs to create a vacuum seal.Pull the sides to ensure a perfect fit." Read Less