Food Grade SiliconeFood grade silicone lid are 100% silicone, BPA free, soft texture, durable and leak proof, maintain temperature from -30 to 230, which can be used in refrigerator, microwave and dishwasher, no worries about the silicone lids being damaged. Multiple Size Provide five sizes of elastic silicone caps: 27.5cm, 23.5cm, 21.5cm, 17.5cm, 10.5cm. Sizes fit most food containers such as cups, plates, pans, bowls. They are also ideal for mason jars, mixing bowls and more. How It Works Vacuum lids work either you press gently in the middle and the lid airtight, creates a tight and watertight seal. You can then use them to store leftovers, foods, salads, vegetables, pastas, soups, ingredients, etc. Reusable and affordableGreat replacement for plastic wrap that always leaves a sticky residue on the edges of our bowls; The silicone cover can be reused after cleaning, reducing costs and the production of household plastic waste