Food grade silicone: Made from imported food grade silicone raw material, it has a soft, tear-resistant texture and a good hand feel. It has excellent abrasion resistance, is natural and harmless, non-toxic, odourless and non-corrosive. It meets the standard food standards to protect the environment. Premium quality silicone lid: They are made of high quality food silicone, reusable and do not leak. The silicone cover can withstand high and low temperatures, which can be used in the temperature range -40C ~ 230C, can be used for refrigerators, microwave appliances, electric cookers. Multi size: They have 6 different sizes: Standard diameters are 6.5cm, 9.5cm, 11.5cm, 14.5cm, 16.5cm, 20.5cm, extends up to 8.9cm, 12.7 cm, 15.2 cm, 20.3 cm, 22.9 cm and 27.9 cm approx. Suitable for most shapes and materials. Silicone stretch lid and reusable lid: Perfect to stretch all shapes and sizes of bowls, cups, cups and other containers. Function: A good seal helps to keep food fresh. Take potluck plates, bowls stacks, unfinished drinks or leftovers of fruit and vegetables.