Durable Silicone Muffin Baking Tray No greasing or oiling of pans required Pans heat quickly and bake evenly with no burnt or dark edges or bottom. Removal from pans is super easy - a slight twist or gently pulling on the sides and roll out your baking. Can be used in temps from -40 degrees to +230 degrees Celsius. They're freezer, refrigerator, microwave, dishwasher and oven safe. Bake, store, freeze and reheat right in the pans. No rusting or staining. No need to alter your batter or temperature - bake as usual. Cleanup is a breeze. Lightweight and perfect for a camper or RV. Storing is easy - although they do not easily nest, no special attention is required and they retain their shape. Silicone items for the kitchen include utensils (spoons, spatulas, pastry brushes, whisks and turners), straining items (handle strainers, colanders, funnels) and heat-resistant grip items (trivets, gloves, mitts, pot handle holders) as well as bake ware (muffin pans, cake pans, baking sheets, loaf pans). Silicone is also used for ice cube trays, egg holders, egg poaching pouches and barbeque tongs. Silicone is resistant to heat and cold, durable, non-stick, easy to clean, and resistant to food acids and chemicals. Use silicone in ovens, freezers and microwaves. Silicone is easy to clean and dishwasher safe. The silicone items that come in contact with food meet FDA (Food and Drug Administration) safety requirements.