The Schott Zwiesel Paris barware is so simple, it's beautiful. The heavy bottoms anchor sparkling clear straight sides for the perfect combination of strength and elegance that you look for in barware. Just imagine the clink of perfect cubes, or the crispness of a straight scotch served unadorned. Made of patented Tritan crystal glass, this non-lead material resists chipping, scratching, and breakage, making it perfect for everyday use as well as entertaining occasions. Schott Zwiesel Paris Glassware is dishwasher safe and will resist etching or clouding.