FOOD GRADE SILICONE, BPA Free – Walfos silicone muffin pans for baking are made of professional quality food-grade silicone, stronger, more flexible and durable. Safe for your family and good for the environment. WIDE HEAT RESISTANT RANGE: from -104 to 446(-40 to 230); tasteless, no chemical coating, safe for microwave, oven, dishwasher, fridge, freezer.