Hydro Flask Standard Mouth PFG 21oz Flex Cap

This PFG-inspired 21 ounce flex cap is the perfect go-anywhere companion. Read more >
Hydration on the Go. Our 21 oz. PFG-inspired flask is the perfect go-anywhere companion on your busiest days. 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. Now with our new Flex Cap for ultimate portablity.
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