The Iron Flask 20 oz Classic 2.0 Tumbler is the perfect cup holder-friendly ally to take with you anywhere. This sweat-proof insulated tumbler features double-walled vacuum insulation that keeps your beverages cold for 12 hours or hot for 3 hours. The second-generation classic tumbler comes with two different insulated lids; a splash-proof straw lid with two straws, and a 100% leak-proof flip lid. Both great options for those who typically spill on themselves (no judgment). Plus, the rubber bottom doubles as a coaster, making your tumbler cup non-slip and noise-proof, so no one around you will go “shh!” Replacement Parts & Accessories Product Features Cup holder-friendly Classic 2.0 tumblers in sizes 16 oz, 20 oz , 24 oz and 32 oz fit in most cup holders. Leak-proof lids Classic 2.0 tumblers come with TWO different insulated lids. A splash-proof straw lid with two straws, and a 100% leak-proof flip lid. So you can enjoy every sip of your favorite drink without bathing in it. Built-in coaster Classic 2.0 tumblers have a rubber bottom that makes them slip-proof, noise-proof and even more durable.