Schott Zwiesel, the famed German producer of "The Best Crystal Glassware" has been a leader in innovation, style and technology for more than 100 years. The company has many firsts to its credit, including the first fully automated product of glass blown glass stemware. In the 1990's, as the glass industry struggled with the environmental issues of lead and other heavy metals in crystal, the company was the first glassmaker to produce lead-free crystal glass of superb quality and brilliance. Schott Zwiesel created Tritan Crystal in 2001 by adding titanium oxide and zirconium oxide to develop "The World's Best Crystal Glass". Our patented Tritan technology makes our glass dishwasher safe and break-resistant, and features crystal brilliance. Enjoy it every day, knowing that sommeliers around the world choose these elegant glasses for professional use. Features of Tritan crystal glass: Meticulously designed shapes to draw out the complexity of your wine's unique characteristics; Sparkling clarity to reveal the nuance of your wine's color; Titanium strength gives you the confidence to use this brilliant, beautiful stemware every day; The graceful shape of the bowl aerates the wine and delivers it to your palette at the peak of perfection. In homage to the origins of scotch whiskey, the Distil barware collection features cut glass designs inspired by Scotland's rich history. Reminiscent of old growth forests or ancient structures, the Kirkwall collection bring an ethereal element to your bar. The Kirkwall martini glass measures 4.6-inches diameter and 7-inches high and holds 8.5 ounces. Made in Germany and featuring the highest quality materials and design.