Take hydration seriously with a seriously massive mug. The YETI Rambler 40 oz Travel Straw Mug keeps your drink at the perfect temperature all day with double-wall vacuum insulation. The 100% leakproof quick-flip straw means no spills during your commute or trail run, while the welded handle delivers a solid, ergonomic grip. Cup holder compatible for seamless car or pack integration. Dishwasher safe for easy cleanup. Both Travel Straw Mug Lid and StrongHold™ Lid are compatible, giving you flexibility to switch between sipping and secure transport.