Silicone stretch lids 12 pieces - economical and durable. Properties: Healthy stuff. - Made of non-toxic and BPA-free food grade silicone, clean and hygienic, saving money and protecting the environment. -Can be reusable, also can replace lost blankets. Keep yourself cool and enjoy it fresh. -Can be refrigerated for cold storage and keep food fresh. - Foods that cannot be eaten at once can be sealed and kept cool. Round and square silicone lid for all types of containers Never a problem reheating food, heat resistant up to 450F. Specifications: Material: 100% food safe BPA free silicone. Quantity: 12 pieces. Color: 12 transparent. Suitable temperature range: -40C to +446F (-40C to +230C). Note: Make sure the lid works better.Make sure the flap edge and lid are completely dry and oil-free. Please do not completely close the container when using your microwave, as the increasing heat and pressure of the container may cause damage or injury. Please wash the silicone sleeves by hand with clean or boiled water. Package includes: 1.6*round stretch silicone cover (2.6", 3.8", 4.5", 5.7",6.5" and 8.1". Silicone stretch cover 2.6 * square (2.6 * 2", 3.7 * 2.8", 4.5 * 3,15", 5.7 * 4.3", 6.5 * 4.7", 8.1 * 5.9").