German-made glasses from Schott-Zweisel are formed from patented Tritan reinforced glass. By replacing lead in the glass formula with titanium and zirconium, Schott-Zweisel has created glasses that are dishwasher safe and break resistant, completely unmarked and unbroken after 1,000 commercial dishwasher cycles. Tritan glassware is not only strong, it has a sparkling clarity, and is classified in Europe as crystal glass. Tritan glasses are chosen by restaurants, resorts and cruiselines worldwide for their durability and unsurpassed clarity, brilliance and luster. So beautiful and durable, you'll want to use them everyday.