CorningWare SimplyLite 3-Quart Oblong Baking Dish with Plastic Lid Introducing a new innovation in bakeware that delivers the cooking performance of traditional glass and ceramic but at half the weight. CorningWare SimplyLite is made of a lightweight yet durable glass that makes cooking easy and entertaining a snap--50% lighter*, 100% CorningWare. (*50% lighter on average versus the leading ceramic bakeware brand.)