Food Grade Silicone 100% BPA-Free: Silicone cover is made of food grade high -quality silicone materials. 100% does not contain tunnels, lead, plastic and BPA, not cheap rubber or TPR materials. The texture is soft, non -toxic, and uses it with confidence to ensure the health of the family. Economic and Environmental Protection:Reduce plastic waste and help you save money.In order to promote environmental protection and reduce bacterial pollution, we adopt the product to seal vacuum packaging to ensure its dryness. Therefore, the products you receive will have folds. Before the first use, you need to wash the product with warm water to restore the original shape of the product. Please use it with confidence. Elastic Flexibility Can Stretch: These silicone lids have super flexibility and elasticity, 6 different sizes (2.7in, 3.7in, 4.4in, 5.4in, 6.4in, 7.9in, elasticity can double stretch. Followed on the alien cup, jar, square and round bowl and fruits.The size is measured manually, there will be an error of 1-3cm. Good Sealing, not Leakage: The silicone cover can form a sealing vacuum environment on glass, plastic or metal containers. Keep fruits, vegetables, beverages and other foods fresh, and keep no overflow and odor. The seal is not leaked, and the liquid is leaked, and the food overflows in the microwave oven. Silicone cover food lid is better than plastic wrap or silver foil. Make it stacked and save space in the refrigerator.( Note: Do not seal the container when heating in a microwave oven). High Temperature and Easy to Clean: Silicone lids can accept high temperature disinfection, heat resistance from -40 C ~ +230 C. Suitable for refrigerators, microwave ovens, dishwashers, and picnics. They can be washed and easy to clean. Just rinse them with warm soapy water or throw them into the dishwasher