CORNINGWARE Universally Versatile Cookware The original CorningWare bakeware which was first introduced in 1958, was made of a glass-ceramic material - PYROCERAM that could be used on the stove, in the oven and under the broiler. PYROCERAM is a highly transparent ceramic glass having virtually zero thermal expansion, thus it can withstand drastic temperature changes…going safely from the range top to freezer to oven. CORNINGWARE is also the ideal casserole dish because it retains heat much longer. This means that you can use a much lower heat setting on the stovetop. Cooking will continue even after the gas has been turned off, resulting in lower gas costs. For fast, healthy meals, CORNINGWARE is equally productive at home in the microwave. Unique Revolutionary Material : Its temperature resistant material not only help you save time and energy, but also does not retain odors or stains. With its “Easy to clean” feature, the designs remain beautiful and vibrant even after years of extensive use. Versatile : CORNINGWARE is a cookware that does it all! It’s extremely versatile and suitable for all your preparation, cooking, serving and storage requirement. It can be taken straight from the freezer to the oven, microwave, gas or electric stovetop and then to dishwasher or sink – no matter how hot or cold the dish may be. Fashionably Functional : CORNINGWARE comes in a variety of attractive designs that work on the stove as well as the dining table. Some designs may complement the different ranges of CORELLE dinnerware to provide matching sets of cook /dinnerware for all your serving needs. CorningWare French White Round & Square casseroles with glass cover. Country of Origin : Made in France and USA.