Welcome! We will do our best to provide you with the best service Material: silicone Size: 6 sizes/set Color: white, blue, yellow, pink, Silicone material and reusable. Can be used in microwave or refrigerators.Keep food fresh. Strong adsorption,leak-proof. package included:1set Bowl Cover Silicone Lid Round Square Stretch Suction Reusable Food Fresh Keeping Fresh Lids Seal Cookware Kitchen Tools Universal Reusable 4 Color. Wishing you all the best in buying your favorite products.