Safety And Health- Your Safety Is Our Top Priority. Silicone Stretch Lids Are Made Of High Quality Silicone With A Soft Texture, Are Durable, Non-Toxic And 100% Phthalate, Lead, Plastic Or Bpa Free. You Can Use The Stretch Lids At Any Time Without Worrying About Your Family'S Health. Universal Sizes- 6 Pack Round Lids + 6 Pack Square Lids. Each Type Contains 6 Sizes, Suitable For Glasses, Pots, Pans, Plates, Bowls, Containers, Coffee Cups, Cans And Other Vegetable Fruits. Keep Food Fresh- The Sustainable Way To Keep Food Fresh And Stored. Airtight Seal Keeps Food Fresh Longer And Protects Against Leaks. Only Before Fixing The Lid And The Rim Of The Pot Should Be Dry. Silicone Stretch Cover Is Better Than Plastic Wrap. Cold And Heat Resistant- Resistant To Low And High Temperature (From -20 To 450). Put The Stretch Lid In The Freezer And Microwave, Dishwasher, Wash And Sanitize After Cooking. Safe And Convenient To Use Easy Cleaning And Storage - With This Eco-Friendly Silicone Lid, It Can Be Easy To Clean And Therefore Reusable. The Flexible Silicone Lid Is Sturdy And Easy To Stack And Saves Space.