Cake Drinkware is a fabulous alternative to traditional glassware. Each piece is crafted from an advanced, durable polymer. The result of this form and function combination provides a truly elevated drinking experience. You can expect our drinkware to have the heft of a glass but the durability, safety, and superior insulation of an FDA approved molecular composition. Microwave and top rack dishwasher safe, Cake Drinkware is nearly unbreakable. Like all Hester & Cook Design Group products, our drinkware is made in the USA and carries a satisfaction guarantee.