Schott Zwiesel – The world’s best crystal glass Built on a 130-year tradition of the finest German glassmaking, Schott Zwiesel is the most durable, most beautifully designed and best-manufactured glassware on the market. Completely lead-free and manufactured using the most environmentally sensitive technology available, Schott Zwiesel crystal glass is the leading choice among wine connoisseurs the world over. Its sculpted bowls and finely edged rims enhance the fullest appreciation of every vintage. Schott Zwiesel crystal glass has added titanium for strength and added zirconium for crystal clarity, making it dishwasher safe for years of enjoyment. The elegant designs match every taste and cover the full spectrum of beverages. For any occasion, for everyday or when serving company, Schott Zwiesel crystal glass is sure to impress.Set of 6 Diva Champagne stemware for use with soft body red and full body white wines. 220ml capacity, 25cm tall. Tritan crystal glass: non-lead material of titanium and zirconium oxide, resists breakage, chipping, scratching, thermal shock resistant. Tritan crystal that maintains its sparkling clarity through years of daily use and entertaining. Patented. The Diva collection is the most complete line in Schott Zwiesl for all purposes; designed for the proper glass shape and size for the intended beverage. Completely dishwasher safe; do not force bowl tightly over dishwasher rack prongs; do not twist stem and bowl while holding one or the other tightly. Made in Germany.