Stock your home bar with these glasses designed for favorite on-the-rocks cocktails, including the double old fashioned. The secret to Schott Zwiesel glassware’s longevity is their exclusive Tritan Crystal and manufacturing technology. By eliminating lead content from glass and replacing it with Titanium and Zirconium, Tritan Crystal delivers superior durability and brilliant light-reflecting appearance. Additionally, Schott Zwiesel reinforces the zones on their glassware most vulnerable