Long Day Of Meetings? Rowing Class? Trip Out Of Town? Stanley's Durable 30 Oz. Tumbler, Made With Recycled Stainless Steel, Is Up To The Hydration Challenge. The Double-Wall Vacuum Insulation Will Keep Your Water Cold For 9 Hours And Iced For 40 Hours. And To Cap Things Off, There’s An Advanced Flowstate Lid That Features A Rotating Cover With Three Positions: A Straw Opening Designed To Resist Splashes Wi