Polycarbonate Martini Glasses, 7oz, Set of 4 CRYSTAL CLEAR - Made of High Quality Polycarbonate Extremely DURABLE and SHATTERPROOF Great for PARTIES, OUTDOORS, and around the POOL! Top-rack DISHWASHER SAFE Resists Cracking, Clouding and Crazing. These pieces offer glass like Beauty and long lasting worry free Strength.