Charles Viancin Grape Lid - Medium 9" 9 Lid in Grape Leaf Design The perfect blend of fun and functional, our lids work effectively on a wide variety of sizes, shapes, and materials including: stainless steel, glass, plastic, ceramic, and even wood. Essentially, the silicone lid acts as a large suction cup which creates an airtight seal that insulates both hot and cold foods, deters pests, and preserves freshness and flavor. Our lids are incredibly durable. Made from BPA-free silicone, they are able to withstand extreme temperatures ranging from 220 degrees C / 428 degrees F to -40 degrees C / -40 degrees F. CHARLES VIANCIN lids help keep messes contained to your pots and pans and not all over your kitchen counter. Done are the days of wasting plastic wrap and aluminum foil. Our lids can be used over and over again and are incredibly easy to clean. The silicone construction ensures that our lids are safe to use with most appliances including: ovens, microwaves, refrigerators, freezers, and dishwashers.