Food Grade Silicone: Equipped with a non-toxic, BPA-free, dishwasher-safe and leak-proof airtight seal to keep your food fresh! Very Practical: The silicone storage lids come in 6 sizes (20.5 cm, 16.5 cm, 14.5 cm, 11.5 cm, 9.5 cm, 6.5 cm), so there is always one in the right size. Duty Cycle: They are eco-friendly, eliminating the need to continually buy expensive plastic wrap. These clever stretchable silicone lids adapt to the diameters of all your containers, whatever the material: ceramic, plastic, glass or metal because the set of 12 lids has 6 different sizes. It is suitable for the refrigerator, microwave, oven and dishwasher. Microwave safe and heat resistant up to 450F (230C) so you can quickly reheat and enjoy delicious leftovers. Note: The data are all measured manually, please allow 1-3cm error Due to differences in light and display, there may be some color differences, please refer to the actual item received.