By replacing the lead in traditional crystal with titanium and zirconium, Schott Zwiesel has created the strongest, clearest, most brilliant crystal glass available. Patented Tritan Crystal retains its clarity and luster for the life of the glass and resists chipping, scratching, and breakage. Pure offers a true gourmet experience. The striking chimneys of these crystal glasses let wines breathe while underscoring even the most delicate of bouquets. With Pure, wine connoisseurs and talented novices can present their wines and cocktails in stunning style and quality. Despite its delicate silhouette, Pure is highly robust, scratch resistant, and dishwasher safe.