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. Two 13.5 ounce classic double old fashioned glasses, paired with two 2.5" diameter large-sphere ice molds, create the Ultimate Whiskey Set. The set has all the right tools to give spirits the perfect chill.