Carlisle Pebble Optic Drinkware Tumblers, 12 ounce, Smoke (One Dozen Dishwasher Safe Break Resistant SAN Plastic Drinking Glasses) Attractive pebbled exterior hides scratches Easy Stack. Made of chip, shatter, and break resistant SAN plastic Has thick walled construction for sturdy feel Withstands temperatures ranging from 0 - 180 F / Dishwasher Safe Available in 6 sizes (5, 8, 9.5, 12, 16, & 20 ounce) & 3 colors (clear, ruby, smoke)