4 DAYS ICED: Keep hydrated for longer wherever you day takes you. The Iceflow Bottle keeps your drinks Iced for 4 days and cold for 17 hours, thanks to Stanley's signature double-wall vacuum insulation. SUSTAINABILITY AT STANLEY: At Stanley, we believe that through invention and originality, we create a more sustainable, less disposable life and world. LEAKPROOF: The IceFlow Bottle Twist Flip is leakproof and perfect for wherever your day takes you. The lid is designed to twist open and push back. This sleek and slim bottle is perfect for bringing with you with no worries of leaks of spills. DISHWASHER SAFE: This bottle is designed to clean easily. Throw it into the dishwasher once home, ready togo again the next morning. Every piece of this stainless steel to go mug is dishwasher safe. LIFETIME WARRANTY: We are a brand that has kept its promises since 1913. We build products to last a lifetime that you can use in rugged environments, delivering innovation of keeping food & drink at an ideal temperature. We are committed to our word