A tumbler collection made of tempered glass, Rock Bar is the most resistant option of all. Its exceptional strength and useful stackability make it the right choice for the trendiest drinks. Perfect when things get rough behind the bar! Play it cool with a rocking glass in hand: these tumblers are just the right size and weight. Suitable for everything from café au lait and hot cocoa to breakfast juices and iced drinks, these durable tumblers glasses will quickly become part of your kitchen essentials.