Food grade silicone with safety certifications - LFGB, FDA and BPA-free certified silicone lids - Environmentally friendly, non-toxic, durable and leak-proof - Safe for both baby and adult use Multi-size design for wide compatibility - 7 sizes in 20 pieces: 2.5 cm, 6.5 cm, 9.6 cm, 11.5 cm, 14.5 cm, 16.5 cm, 20.6 cm - Covers containers of different shapes and sizes - Suitable for salad bowls, glass, food, cans, cups, beer bottles, juice caps, pots, pans, watermelon, pineapple, melon, and other fruits Fresh food preservation - Stretchy lids help keep food fresh and protected from weathering - Can be used directly on fruit; paint-free and easy to clean - For best results, ensure both the lid edge and container rim are dry before installation Reusable and easy to clean - Made of high quality silicone with a soft, tear resistant, wear resistant texture - Temperature range: -40 C to +230 C - Safe for dishwasher, refrigerator, microwave, and oven use Practical use scenarios - Keep leftovers in bowls or pots in the refrigerator without waste - Seal cut fruit such as watermelon or melon to prevent drying and odors - Pack and transport beverages or foods in cups, cans, bottles, or jars for home, work, or travel