Made to Dine Oval Casserole is made of porcelain material which is especiallydeveloped to withstand high temperatures. Its unique and revolutionary material allows it to go straight from the freezer to direct fire, saving you time and energy and keeping your food warm for longer. Its classic design complements multi-functional use whether for cooking, storing or serving. Whether it is direct flame (gas or fuel burner), hot plate (electric coil), conventional or microwave oven, Made to Dine Oval Casserole cookware will be your versatile and multi-functional glass cookware for years.