CorningWare Creations 12-Ounce Au Gratin Dish, Onyx Large open handles allow for easy, safe handling Durable stoneware material designed for use in oven, microwave, refrigerator, and freezer CorningWare material resists chipping and cracking Non-porous surface does not absorb food odors, flavors, or stains 12-oz. Au Gratin Dish, Onyx