Lekue Muffin Cups 6 Pcs All Lekue baking molds are made of platinum silicone and can go in the oven or microwave. Platinum silicone molds are treated with special nonstick so only need to oil them before first use to activate the nonstick properties. De-molding: for perfect results allow the food to cool completely. To remove: pull sides away gently and press on the base until the cake comes away. Please freeze mousses before de-molding to avoid breaking. Oven safe to 500f. Can also be used for cold recipes and can be stored in the fridge to -76f. Contains 6 Pcs (3 Colors X 4 Pcs) Assorted colors (7cm).