Schott Zwiesel is one of the world's leading manufacturers of glass products. The company has developed and patented an innovative material - "Crystal Titanium" (Tritan® Crystal Glass), not containing oxides of lead and barium. The use in the production of this unique material and the use of special technology have greatly improved the quality of the glass product. Schott Zwiesel products have high impact strength and resistance to temperature, perfect gloss, and transparency. The glass can be washed in the dishwasher with regular detergents.