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Grab the Hydro Flask 21oz Water Bottle when you've got a hankerin' for some liquid refreshment. The food-grade stainless steel material won't retain odors, while the double-wall vacuum construction keeps cold items cold for at least 24 hours, and hot items hot for twelve.

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Hydro Flask 21oz. Standard Mouth Water Bottle

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Here's what others have to say...

5 5

Why use anything else?

In an age where we want everything in life to be stimulating, Hydro Flask stepped up to the task with drinking liquids. These are durable and extremely scratch resistant and taking a sip of water becomes an actual experience. I use mine for water mostly, and the water stays ice cold for hours and hours. I don't know where they got their claim of 12/24 hours, but regardless the water stays about the same temp for 6+hours. Haven't messed with hot water as much, but know I can leave it in my car with hot water and come back for lunch and it's still really hot. Definite recommendation

5 5

This thing Rocks!

  • Familiarity: I've used it several times

I just got this thing last week and it is amazing. I put in ice cold water with a few cubes and it stays cold FOREVER, i even wanted to test it out so i left in inside my hot cot in direct sun while grocery shopping and came out and the bottle felt warm to the touch but the water was still ice cold on the inside. I like this thing so much i bought 2 more in different colors.

5 5

Best. Bottle. Ever.

  • Familiarity: I've put it through the wringer

Holds temps. used in desert and cool water all day. Use my smaller one for coffee. No sweating. Great hand feel. Sturdy, though I put my new one in my luggage near the outside of bag and it got a dent in bottom and chip in coating during my recent flight. Wonder how I didn't know about this for so long.

5 5

no sweat

  • Familiarity: I've put it through the wringer

Doesn't sweat..perfect for desks.
Keeps liquid the temp you want..for a long time.
I've used the regular stainless steel without the double wall vacuum and I don't know why I put up with that for so long. Material is a great feel on the hand too, you don't notice the interior temperature on your hand, only when you are drinking the beverage.

My husband and I received your 21 oz...

Posted on

My husband and I received your 21 oz Standard Mouth Hydro Flask bottles. We love them, but we would like to get different lids? My husband would like a flip type lid, and I would like a straw type one preferably. Is this possible? Thank you for your reply.

Best Answer Responded on

Options are limited for narrow mouth bottles:

http://www.hydroflask.com/categories/caps-lids

is the whole thing dishwasher safe?

Posted on

is the whole thing dishwasher safe?

Responded on

Illinois,
Hydro Flask recommends that you do not wash the21oz. Standard Mouth Water Bottle (or any of their flasks really) in the dishwasher.

Responded on

That said, I didn't know that and I've been washing mine for at least a year and it seems fine. It's all steel, so I'm not sure what the issue is.

5 5

Amazing Water Bottle

  • Familiarity: I've put it through the wringer

These are hands down the best water bottles we have ever owned.
It keeps hot liquids hot, and cold ones cold. I love that it can be filled with ice on a blistering hot day, and the outside of the bottle doesn't get condensation on it. Everyone in the family has at least one, and are requesting the different sizes for different events.

Hydro Flask: hot water test

Posted on

Testing the heat retention of the double walled vacuum sealed Hydro Flask 21 oz. Water Bottle.

Responded on

Cool experiment Zach!
Thanks for sharing!

5 5

Worth every penny!

  • Familiarity: I've put it through the wringer

I drink a lot of water, and I've gone through a lot of water bottles over the years. I used Nathan brand water bottles but a friend of mine had a Hydro Flask and recommended it. I love that it's insulated, and the water stays freezing cold for hours. By far the best, look no further!

5 5

Love it

  • Familiarity: I've put it through the wringer

I use this bottle everyday. In the morning its used as a water bottle while working in the warehouse, then when I get home it turns into a thermos for coffee to get me through my school day. At the warehouse, through an eight hour day the water feels as cold as when i poured it, and at night during classes, the coffee stays as hot as when it was brewed for 2.5-3 hours, then it slowly cools off, and I mean EXTREMELY slowly.

5 5

Update: Tested Heat

  • Familiarity: I've used it several times

I tested my Hydro Flask with hot liquids yesterday. I put in boiling hot tea at about 8 am and drank it slowly throughout the day. It stayed really hot for a long while, I started to notice cooling around 2 pm. It stayed drinkable hot until around 4. Once 5 pm hit it was a warmer lukewarm, still bearable :) I can say for the weight and design of the bottle this was incredible! Love it!

5 5

Pretty Awesome!

  • Familiarity: I've used it several times

These bottles are pretty good, I use them for tea and water. I have only tested cold water to four hours and it kept it awesome cold! I dropped it empty from 3 ft once and out a small dent and it looks like the insulation might peel but it's still good! Love it!

5 5

BEST GIFT ALL YEAR !

  • Familiarity: I've put it through the wringer

In August, on my way to the USTA Sectional Competition, I met up with my daughter, and she surprised me with two Hydro Flask bottles. The 21 oz. and the 40 oz. I thought it was overkill, I mean how much water can I drink while playing tennis. How wrong I was !! It was over 108 degrees on the courts, and I drank my 21oz in about 35 minutes. Wonderful cold water, then I proceeded to drink the 40 oz also. Prior to her gift, I would bring a mid-size cooler and once I took the bottle out of the cooler , my ice would be gone before the second set. When I got home, I tossed
all my other water bottles !! Don't need the cooler. I love knowing that my water will be cold well over 12 hours. My only complaint is that for the 21 oz bottles, you are sold out of the tops that make drinking possible without taking the top off.
Regardless, I'll wait for it because it's worth it. I even think my game has improved ! Also, I need a lime green bottle for my son !! You ROCK !!!!! Annie

5 5

Best Recommendation I've had in a while

I had a friend recommend these for all things hydration, hot or cold. I am now a fan. They keep the goods hot, and I mean HOT! I am all about hydro Flask and the products that they re turning out. I would recommend to anyone.

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