Featured with food-grade silicone, will not produce toxic and hazardous substances during the use, BPA free. Temperature Resistance, The doughnut pan is safe at the temperature between -40 and 230 Degrees Celsius, suitable for microwave, freezer and dishwasher. The silicone trays are non-stick, dough-type won't get stuck in the cavities, and even if they will, you could use some warm water to clean easily. The flexible silicone makes the donuts easy to be removed as you can just pop the bottom of the mold up and slide the donut off the extended center. Apart from donuts, you can use the molds to create anything you like, from ice rings and chocolate cakes to bagels, muffins, frozen delights, cupcakes or anything else you want.