Hydro Flask's 21 oz water bottle 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. The 21 oz Standard Mouth is one of their best selling vacuum insulated water bottles because of it's size and versatility.Read more
Used in every product they make, TempShield™ is Hydro Flask's double wall, vacuum insulated technology that guards the temperature of your drink. Bring ice water with you in the morning, and we promise you'll still have ice in the afternoon. Hectic morning getting in the way of your coffee sipping? No problem. They'll keep it hot until you're ready. They also guarantee no condensation or heat transfer to the outside of the bottle, ever.