Schott Zwiesel Tritan Forte Universal Tumblers / Longdrink - Set of 6 Set of 6 Forte Universal Longdrink Tumblers; 18.6 oz. Capacity; 5 inches Tall Tritan crystal glass: non-lead material of titanium and zirconium oxide, resists breakage, chipping, scratching, thermal shock resistant; patented. Tritan crystal that maintains its sparkling clarity through years of daily use and entertaining. Patentted. Each bowl is perfectly sized for the appropriate wine; soft tapered bowl focuses wine essence to the pallet. 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.