The Hydro Flask 21oz Standard Mouth Insulated Water Bottle will keep life moving with our 21 oz bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's one of our bestselling water bottles.
Hydro Flask 21oz Standard Mouth Insulated Water Bottle features:
- Made of 18/8 pro-grade stainless steel, recognized for its strength and purity.
- Protects against flavor transfer, so today’s drink doesn’t taste like yesterday’s
- Stashes easily in shoulder bag, pack and fits most vehicle cup holders
- Versatile middle-of-the-road size
- Compatible with Standard Mouth Insulated Sports Cap
- BPA- and Phthalate-free
- Lifetime warranty