Schott Zwiesel has been a leading producer of glassware for over 100 years. Their Triton crystal is lead-free and contains titanium oxide and zirconium oxide. As a result, the glasses will not etch, cloud, or discolour for the life of the glass. They are durable, don't chip or scratch easily, and are thermal resistant so can go in the dishwasher.
All Schott Zwiesel glasses are a pleasure to drink from with their smooth, thin, elegant edge.