Premium ceramics made from fine clay, glaze-fired twice with a natural glaze.Casserole clay pot is great for making soup, stew, or even rice.Ideal for personal casseroles - Use your imagination. Microwave,stovetops, oven, refrigerator and dishwasher safe. The long-lasting material blocks moisture absorption and prevents cracking and rippling.These oven safe crock bowls are easy to clean.