A 130-year tradition of glass-making excellence supports Schott Zwiesel's brand reputation as the world's best crystal glass. Their unique Tritan crystal glass composition, which infuses titanium into the glass, has made their premium glassware highly desirable and durable. Titanium makes the glassware break, chip, and scratch-resistant. The glass is tempered at the rim, where the stem meets the bowl as well as at the junction of the foot and stem, providing strength at all junctures, where breakage could occur. The combination of strength, durability, as well as easy-care, makes Schott Zwiesel glassware the perfect glassware for all of your daily and entertaining needs. The Contemporary martini design looks elegant while minimizing spillage!