What Our Gearhead(R) Experts Are Saying: "I use this 40oz every day. The narrow base rides in my car holders, the FlowState lid switches from straw to sip fast, and the insulation keeps water cold through work and workouts. The handle is comfy, and cleanup is easy in the dishwasher. Simple, durable, and it actually helps me drink more."We reach for Stanley's The Quencher H2. 0 FlowState 40oz Tumbler when one fill needs to last from commute to cooldown. Stanley's double-wall vacuum insulation keeps drinks at temp for hours, and the rotating FlowState lid makes it effortless to choose straw, open sip, or full cover. The Quencher's cup-holder-friendly base and silicone-padded handle travel anywhere, while recycled stainless steel construction and a dishwasher-safe design make daily refills easy on us and the planet.