Ohio Stoneware's Kitchen Naturals collection is crafted of durable, high-quality stoneware with an unglazed finish for a beautiful, natural look. Nothing bakes better or more evenly than stoneware! Each baker is fired at a high temperature for durability! Lead-Free, Food-Safe. Ready to use. Easy to clean. Microwave safe. Oven safe. Dishwasher safe. High Quality!