Hydro Flask 21oz Insulated Water Bottle

Hydro Flask 21oz Insulated Water Bottle -

Product Details    

Style: S21

Stop forcing lukewarm water and cold coffee down, and keep it refreshing with the Hydro Flask 21oz Insulated Water Bottle. This 21-oz food-grade stainless steel bottle uses double wall vacuum insulation to keep your chilled drinks cold and hot drinks hot. Its 1.81-in mouth is big enough to drop ice cubes into.

  • Medium sized 21 oz capacity
  • 18/8 food-grade stainless steel makes for rugged, BPA-free, recyclable construction
  • Double wall vacuum insulated design keeps drinks cold for up to 24 hours, or hot for up to 12 hours
  • 1.81" standard mouth offers smooth drinking and easy icing
  • Lifetime warranty against defects
  • Cap is dishwasher safe / bottle is not

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REVIEW SNAPSHOT®

by PowerReviews
Hydro Flask 21oz Insulated Water Bottle, Classic Stainless
 
4.6

(based on 43 reviews)

Ratings Distribution

  • 5 Stars

     

    (35)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

90%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

This was the size that sold me!

This was the starter size for me that lead to my collection of all of the hydroflask sizes, except the 24oz (recently added, that's next).At first I bought this as a trial...Read complete review

This was the starter size for me that lead to my collection of all of the hydroflask sizes, except the 24oz (recently added, that's next).At first I bought this as a trial for my husband to take to work. He's a fuel truck driver on Oahu and the heat with humidity can make u sweat like crazy. He filled it up with half ice and water and he said it was wayyyyy better than the plastic frozen water bottles that he'd reuse all the time. Then he said he wanted a bigger size just for him. So I got him the 40oz n he said after 4 days it's not big enough so I got him the 62oz n he's been happy eversince. Me I had to get 32oz as the 21oz wasn't lasting me all day. But we still use the 21 when we gotta drive around alot as it's the only one that fits the standard size cup holder in our truck n we have the 64oz filled up ready to refill our 21. Bcuz of having access to ice cold water all the time. This product has helped us to lose weight alot and proud to say no more cotton mouth anymore. The reason I choose only this brand is their lifetime warranty, no one has this. I'll gladly pay the price for high quality and they keep their word too! I had 2 of my flasks returned using the warranty and had no problems since. As far as choosing btwn the stainless steel and the color. We ended up liking the one with color, the reason on is the heat. When u touch the stainless steel one and left iy in ur hot car, it's hot to touch but the ice is still there. When u do the same with the color one, its doesn't burn n there's grip to it. Like a sand kinda paint for it so it's not slippery like the stainless. My only little concern is having the larger sizes fit in the cup holder. But then again I understand the design would make it more expensive, besides other people makes holders, etc. so I can hang it from the neck part of my seat in my truck. Thank you Hydroflask for an awesome product. Sincerely, Da 808 couple!

VS

Most Liked Negative Review

 

Sweat sweat and more sweat

I just received my 21Oz standard mouth stainless steel and it's 80 degrees with 41% humidity right now. I filled it with ice and then filled it with room temp water. I realize that...Read complete review

I just received my 21Oz standard mouth stainless steel and it's 80 degrees with 41% humidity right now. I filled it with ice and then filled it with room temp water. I realize that some Ice will be melting due to the room temp water, but it's sweating all over my desk and I'm pretty sure this should not be happening! NOT HAPPY, also, about half the ice is gone and I have not opened it more then one time for a quick sip. Did I get a lemon or what? I expected more, A LOT MORE for this price and from a name I THOUGHT I could trust! My biggest regret is I also ordered the wide mouth 20OZ also that I have not gotten in the mail yet. Right now I don't want either of them!

Reviewed by 43 customers

Displaying reviews 1-20

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5.0

Love it.

By 

from Dededo, Guam

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

Lost my first 21 oz and had to get another. Best way to stay hydrated esp living in a tropical island of Guam.

 
5.0

Love it!

By 

from Fayetteville, AR, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

Oh my goodness, I absolutely love mine and I would recommend getting one of these for anyone!

 
5.0

Best water bottle I have ever bought

By 

from Undisclosed

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I bought one about a year ago in 29palms and it has withstood the test of time. I dropped it out of a 7ton during an op with the Marines and it still kept my water cool and fresh. I will definitely buy more

 
5.0

Amazing quality plus the perfect size!

By 

from Eugene, OR, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I love hydro flask containers. I was skeptical of how cold it really kept the water but after 3 hours in the 77 degree sun, my water was still ICE COLD. I bought the 21oz because I really didn't need something huge and I also wanted to pack it around in my backpack and to my classes. It is incredibly cute and the mint color is much cuter in person than online (It looks more green in the picture). They are also super easy to take care of. Overall, really great product. I tend to stay away from items that are "trending". But I have to say, this item was worth it!

(0 of 1 customers found this review helpful)

 
1.0

Sweat sweat and more sweat

By 

from Grayslake, IL

Verified Buyer

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I just received my 21Oz standard mouth stainless steel and it's 80 degrees with 41% humidity right now. I filled it with ice and then filled it with room temp water. I realize that some Ice will be melting due to the room temp water, but it's sweating all over my desk and I'm pretty sure this should not be happening! NOT HAPPY, also, about half the ice is gone and I have not opened it more then one time for a quick sip. Did I get a lemon or what? I expected more, A LOT MORE for this price and from a name I THOUGHT I could trust! My biggest regret is I also ordered the wide mouth 20OZ also that I have not gotten in the mail yet. Right now I don't want either of them!

 
5.0

awesome

By 

from Las Vegas, NV, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I bought this a while ago and I would take anywhere I go. during summer the car got so hot but my water was iced just how I put it.

 
3.0

Works great, just not sturdy

By 

from Florida, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

The only problem I've had was when it fell of a three ft table, the bottom dented. I was expecting it to be more durable for the price paid.

 
5.0

Stays Cold For a Long Time!

By 

from Iowa

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I am absolutely in love with these bottles. We own two of the orange 21 inch standard mouths. These bottles keeps our drinks cold for hours and hours. Fantastic product!! I highly recommend these bottles!

(1 of 1 customers found this review helpful)

 
5.0

Exceeds expectations!

By 

from Far Northern California

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I was given a Hydro Flask a year ago and my immediate family slowly acquired a Hydro Flask for themselves. We all loved them so much that we got each family member for our reunion in Acadia National Park. Only regret is not enough colors in the larger jugs. I like "Matchy Matchy"

 
5.0

Stays cold for a day!

By 

from KC

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I've stays frozen forever! Love this product!!!! I buy it for gifts now!

 
5.0

Best Water Bottle Ever

By 

from Vancouver, WA

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

This water bottle keeps the same temperature for the whole day, even in a hot car!

 
5.0

YES

By 

from Harw

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

DON'T DRINK WATER ANY OTHER WAY. DRINKING WATER OUT OF THIS HYDROFLASK IS COMPARABLE TO DRINKING UNICORN TEARS POURED THROUGH A SPARKLING CLOUD FILTER OUT OF A BOWL OF DIAMONDS. MAGIC IN THE MOST TRUE SENSE OF THE WORD. I LIKED THIS PRODUCT SO MUCH I NAMED MY DOG HYDRO.

 
3.0

So much for the pretty colors

By 

from O'Fallon, IL, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I use this bottle for sport, I have the sports cap on it and I do like that feature. It holds ice well, as another reviewer said, the more ice you put in it, the longer it lasts. I've had ice last up to 8 hours before and that wasn't even half filled. However, this bottle is the shape and size to fit into a bottle cage of a bike, but I would highly not recommend it. This is not a durable product. I took it on just two road rides, each time in a different cage, the first time wasn't so bad, just scratched around the bottom, but I made the mistake of putting it in the lower cage and it took a beating. I could hear it rattling around a little, but I didn't think it would be this bad. This powder coat finishing marks so easily that it's a flaw in my opinion. Even in store, you could tell that just because the bottles rubbed up against each other a little, they transferred color onto each other, you could see red on a blue bottle that was next to it and so on. It's a fine product, but is it worth it if the pretty colors are ruined in such a short time?

(1 of 1 customers found this review helpful)

 
5.0

LOVE MY HYDRO FLASK!!

By 

from New Jersey, United States

Verified Buyer

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I'm a teacher and lacrosse coach. I prefer to have ice available all day...quickest way to cool the body down. After a long hot day on the field and over a 48 hour period I had significant amounts of ice in my flask...with icy cold water to drink!! My current Hydro Flask was a gift, but I plan on purchasing several other items.

P.S.
My niece said I always have/ find great cool gadgets and technology. This is now the best, new thing I've ever had!! I use it everyday and I find I drink more water because it is icy cold.

Thank You Hydro Flask & Thanks Kevin and Marissa for the Great Gift!

 
3.0

Good Product

By 

from Mason, MI, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

Overall I really like this bottle, I also bought the sport top and I love it. It keeps my water cold for while. It stays colder longer with the more ice you put in it, ok when you don't plan on drinking it right away. My only complaint is that it is not very durable. it is very easily dented.

(1 of 1 customers found this review helpful)

 
5.0

Love this product!

By 

from Davidsonville

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I probably have about 15 hydroflask products. I have loved them from the first one I bought. I HAVE to have my drinks ice cold. I was amazed at how I left my 21 oz container in my car on a piping hot day, for at least five hours. When I got back in my car my bottle still had ice in it! That was when I was sold on these products. I use the pints at home for my iced tea. Who says you have to only drink beer from them? I just simply cannot say enough good things about this product. Only wish they weren't so expensive. :-)

 
5.0

Does exactly what it's supposed to do!

By 

from Dalla

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

Keeps water cold for over 12 hours! I still have ice cubes left after leaving it in the car.

 
4.0

Great water bottle

By 

from California, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I bought this last month for my daughter to take to school with her. It is the perfect size to fit in her backpack's mesh cup/bottle holder. The 24 oz. was a little too large but the 21 oz. works great. I tested the claim that it keeps water cold for 24 hour and, sure enough, it did. I was very impressed. My only complaint is that it dents easily (hence, 4 stars and not 5) but, if you don't drop it, no problem. I like the current cap for hiking, boating, and other outdoor activities. I would prefer a flip up cap for sports activities. It appears to be sold separately and I may try it. Hyrdo Flask offers a lot of colors for this bottle which is great. Choosing a unique color helps my child keep her water bottle separate from the other kids.

 
5.0

I love my Hydro.

By 

from Stansbury Park, UT, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I was given this as a gift, and it has been the best gift! One morning I made tea, and for some reason or another I didn't drink it in the morning. I was in my car and I looked down and saw that my hydro was in the cup holder. At that point I was sure my tea was cold, but I was thirsty. I took a sip and it was still hot! I was so pleasantly surprised! Ever since then, I carry my hydro everywhere. I have been trying to drink more water, and having my hydro has been the best thing for that goal. I love my ice water that will stay ice cold for the whole day! I am so about this product, I am looking into buying the 32oz and I know I won't be disappointed! #Godbless

(1 of 1 customers found this review helpful)

 
5.0

Really keeps temperatures!!

By 

from Pittsburgh, PA, United States

Comments about Hydro Flask 21oz Insulated Water Bottle, Classic Stainless:

I did a lot of research looking for a "water bottle" to keep colds cold longer. I am pleased to report that my research ended here and I love my hydro flasks! I ordered the standard mouth 21 ounce after seeing how large the 24 ounce was in person at a local retailer. This fits perfectly in my car cupholder - with room to spare. It measures 11 inches high, which is larger than I expected. It really does keep colds/ice cold for long periods. It is great for playing sports outside and having a truly refreshing drink. I love that it doesn't sweat at all. I also love that you can switch between water, juice, beer, etc. and never notice the prior smell inside. It is super easy to clean/maintain. It is leak-proof as indicated in the product specs. I am pleased with the affordability compared to some other brands - this is everything I could I ever want and would never need to pay more for a similar product. I would recommend really thinking about what you're using it for before purchasing; I wish I had gotten the wide mouth so it would be wider and shorter. I also wish I had ordered the standard sports cap earlier, it's much easier than opening the original lid each time I take a drink at my desk at work. I will continue to love the products I have and look forward to gifting more in the future!

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