nathan speedmax plus bluestone nathan lightweight and ergonomic, this 22 oz grip-free handheld running flask is the perfect training partner for longer runs. add ice easily with the large cap opening, and enjoy the high volume flow of the push-pull blast valvetm cap. features: 22 oz / 650 ml ergo speeddraw flask with push-pull blast valvetm cap offers quick bursts of fluid large cap opening to easily clean and add ice cubes fully-adjustable hand strap with chafe-free thumbhole enables grip-free running expandable zippered pocket for running essentials, fits up to iphone 6 specification: weight: 4 oz / 115 g (with bottle) storage capacity: 10 cu in / 0.16 liters