Hydro Flask

21 Oz Standard Mouth W/ Sport Cap

$35.95

Buy Now Review It

At Hydro Flask

They're pretty much the perfect pair—our 21 oz Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down.