Durable / Easy to clean / Speeds the cooking process / Helps save energy / Non-porous / Non-reactive / Microwave & dishwasher safe PYREX glassware is incredibly durable and easy to clean. Unlike earthenware, porcelain or enameled dishes, PYREX glass absorbs, rather than reflects oven heat waves. This speeds the cooking process and helps save energy. Its a durable and practical form of cookware thats easy to clean and attractive to serve with. PYREX glassware products can go directly from refrigerator or freezer to a microwave, convection, or preheated conventional oven. A small amount of liquid should be added to the ovenware vessel prior to baking foods that release liquids while cooking. # PYREX glassware is non-porous glass, so it wont absorb food flavors, odors, or stains. # PYREX glassware is non-reactive, so acid-based recipes, including tomato-based sauces, lemon-infused dishes and vinegar-based poultry sauces can be prepped and baked without affecting the result of the recipe. # Made in America, PYREX glass products are microwave and dishwasher safe.