Hydro Flask 21 oz Standard Mouth Drum with cap Standard Flex Cap black

The Hydro Flask 21 oz Standard Mouth Standard Flex Cap water bottle is one of the brand's best sellers thanks to its 621 ml volume and a size that makes it easy to store in a small shoulder bag, in the side pocket of a trekking backpack or in a vehicle cup holder. Thanks to the TempShield insulation system developed by Hydro Flask, there is no condensation and the bottle keeps drinks cold for 24 hours or warm for up to 6 hours. Features:- TempShield technology to prevent condensation- Keeps cold up to 24 hours- Keeps hot up to 6 hours- Made with 18/8 Pro-Grade stainless steel- BPA-free- Volume: 621 ml- Nozzle diameter: 48.5 mm / 1.91 in- Container diameter: 73 mm / 2.87 in- Container height: 265 mm / 9.4 in- Weight: 295 g / 10.4 ozTechnology:- TempShield:A unique insulation system made with double lining inside the bottles to keep liquids cold for up to 24 hours or warm for up to 6 hours.