After long years of intensive research and development, in collaboration with the University of Erlangen, Schott Zwiesel has succeeded in creating a new type of crystal glass. The use of proprietary ingredients combined with an advanced manufacturing process, has created an incrediibly pure, hard and clear crystal glass. A crystal glass that is highly resistant to the corrosive effects of commercial dishwashers as well as resistant to breakage, patent crystal glass that set new standards.