Best Material These silicone bowl lids are made of high quality and Eco-Friendly,100% food-grade silicone. Best Food Cover These silicone bowl covers can be used as food cover and saver for various sizes of pot, pan,dish.Ideal for storing leftovers, taking dishes to potluck, stacking bowls, unfinished drink, leftover fruits and vegetables.They are great silicone food covers. Lids RatedThese silicone lids Rated -40 C (-40 F) to 232 C (450 F). Approved Dishwasher, Microwave and Freezer safe so you can enjoy delicious leftovers conveniently. Storage Container These silicone food covers can work well with most kinds of storage containers.Please avoid using abrasives or storage foam cleaners to wash these lids.Just wish it with water.When you use it, please dry the edges of the container to prevent the silicone lid from falling off. Reusable These reusable silicone lids create a perfect seal on glass, plastic or metal containers, they can also use as replacement lids for round or square shape containers.It is a great silicone food storage product.If you have any questions about this product, please feel free to contact us.