Standard Mouth Flex 21 oz
Keep life moving with Hydro Flask's 21 oz Standard Mouth Flex Cap. It stores easily in a small shoulder strap bag, the side compartment of your backpack, or in your car's cup holder, and holds enough ice-cold goodness to keep you going for hours without weighing you down. No wonder it's one of Hydro Flask's best-selling water bottles.
Volume 621 ml.