STARBURST DESIGN, 20 oz. (Ounce) Polycarbonate Clear Diamond Tumblers Feature Stackable Anti-Jam Locking Tabs, Virtualy Unbreakable, Set of 4 - Clear Tumblers Clear, durable, shatterproof polycarbonate Unique Starburst base minimizes surface skidding Stackable and feature Anti-Jam tabs Price reflects 4-cups per order Volume Capacity - 20 ounces Ideal for whiskey cocktails