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The Hydro Flask 40oz Water Bottle isn't messing around when it comes to ample hydration. This girth-some bottle ensures you have plenty of H2O for a day on the trails, and the food-grade stainless steel material keeps funky odors at bay. This double-wall vacuum insulated flask also keeps cold items cold for at least 24 hours, and hot items hot for twelve.

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Hydro Flask 40oz. Wide Mouth Water Bottle

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Here's what others have to say...

5 5

Justin Mason

Member since 
Groups:
  • Familiarity: I've used it several times

I heard a lot of people talking about Hydroflasks, so I decided to try one... I absolutely love it. I use it daily for work and keeps my beverages cold all day and night! I recommend this bottle for everyone!

Is this 40-oz flask compatible with the...

Victor

Member since 
Posted on

Is this 40-oz flask compatible with the new Hydro Flip lid? That lid is apparently not compatible w/ the "old style" 40-oz, but there's no info here on whether this one is the "old style" or the "new." Many thanks.

Alex Degnan

Member since 
Groups:
Responded on

The is the "new" style
The new Hydro Flip lid will indeed work with it.

5 5

aaronboston

Member since 

I can't comment on the hot liquids as I hardly ever drink anything hot, but for cold liquids, not much better - at least nothing that I've ever used that can be carried without leaking! I put ice cubes in at 7am & when I get back between 5-7pm, there are still multiple ice cubes still remaining - and this is after a full day on trail in 80+ degrees!
As far as durability, seems pretty good - had it for about 6 weeks and nothing besides a few minor scratches. Only issue I've had is not seating the lid correctly which allows it to leak, but that's more my fault than the bottle. Hydroflask is also great with any issues - I have an older 18oz bottle that the lid cracked - they mailed me a new one, no questions asked.

5 5

S. Wong

Member since 
  • Gender: Male
  • Familiarity: I've put it through the wringer

The 40oz is plenty big to last you throughout the day even if you're a camel. Well ok, I wouldn't go that far, but I always end up bringing it home or back to the campsite with me after a full day of activities still filled with liquid. This thing retains cold and heat really well - I can drop ice cubes in this and it'll still be there by the end of the day. I've also used it for hot chocolate too, and I practically burned my tongue assuming that, after 2 hours of not touching it in the car (don't try to drink out of this while driving by the way...), it would be plenty cool enough to drink. I can't say it keeps things hot for half a day since I've never kept anything in there for 12 hours without actually drinking what I packed (and really, for those that are complaining that it doesn't retain heat after n hours, how often are you going to pack something hot in one of these for that long without actually drinking it?).

One feature I really liked about 40oz I got was the wide mouth, which made putting in ice cubes, protein/chocolate powder, etc. much easier without the need of a funnel.

Unfortunately I'll be returning the 40oz for the 18oz wide mouth since the 40oz can't fit in the bottle pocket of my camera backpack (Kata bag), which I carry around to most hikes and climbs :(. Keep this in mind in case your bag doesn't offer a very spacious bottle pocket.

5 5

Adam Johnson

Member since 
Groups:

I've converted from Nalgene to HydroFlask for my everyday work water bottle. The flask's ability to keep water cold is a major plus (something I didn't even think I'd care much about until I started using HydroFlask and the advantage was clear), and the versatility really wins it for me (I can use it for coffee or drink mixes without having to worry about it retaining scents the way Nalgenes do). Also, this thing is a beast. It's almost (just almost) too large to carry around frequently but come on, it's worth it. It holds a lot of water.

5 5

bri4445850

Member since 

I use this bottle keeping boiling water.
And it did work well.
At least for 6 hours, water is pretty hot.
Good bottle.

5 5

jacp383263

Member since 

We have a few of these. They keep the drink cold for most of the day.
We use them for camping and at the tennis courts too.
We got a sleeve to protect against bumps ;-)
Love it.
-Jack

2 5

lmtp327098

Member since 
  • Gender: Female
  • Familiarity: I've used it once or twice and have initial impressions

I was excited to get my Hydro Flasks because I read many great reviews. These containers do not retain heat. As many other reviewers stated, you need to "prime" the vessel by preheating it with hot/boiling water for 5-10 minutes and warm up the food to piping hot temperature. I did all that. I put the food in at 7:30am, but by 12pm the food was lukewarm.
I believe these containers are better at retaining cold temperatures. This did not work for the purposes I needed which was for a hot lunch. I returned them.

5 5

ranp72705

Member since 
  • Gender: Female
  • Familiarity: I've put it through the wringer

I use this bottle every day to carry my green smoothies! I love the feel of the bottle, it is not too heavy to hold, and not slippery at all.

4 5

Israel Garcia

Member since 
Groups:
  • Familiarity: I've put it through the wringer

At first I was skeptical when I heard about hydroflask's performance. So I bought one and tried it out on Cataract canyon, I was amazed when it held ice for 3 days in 105 degree heat during the day and the lows were in the mid 80's. Since then I have used it for an entire summer backpacking, hiking, camping and rafting and it does what it's suppose to do, keeps hot things hot and cold things cold

blap146562

Member since 
Responded on

I'm skeptical, I spent the day with a friend who bragged about this container. It was in the 60's. after 8 hours the ice cubes had reduced to nearly nothing. But your saying 3 days @ 105, that I would have to see. however, I do believe it would keep water at room temperature indefinitely anywhere in the world.

5 5

geraldcf011103127

Member since 
Groups:

I took it backpacking with me. There was still ice in it when I came out 2 days later. I left one filled with ice and water in my car, and the water was still ice cold with some ice left. I had to buy one for every member of my family so they would leave mine alone. (I haven't had any problem with them leaking.)

blap146562

Member since 
Responded on

I very curious, What size bottle did you take? If you took this backpacking and it still had ice after two days, what did you drink for the two days because when I backpack I go thru a couple hundred ounces in a day.

5 5

Melanie

Member since 
Groups:

I absolutely love this bottle. It is very hot where I work, and it keeps my ice for 24 hrs. It definitely has helped me increase my water consumption since I bought it. It's a little heavy, but well worth carrying around. Love it.

5 5

Patricia

Member since 

I have had many insulated bottles I love this one best. I bought 2 more smaller 26 oz that fit in my car cup holder I love it so much. I broke my handle to this bottle and Hydro Flask replaced it free and I did not even purchase it from them.

5 5

Josh Nichols

Member since 

Love these water bottles. They do an amazing job of keeping things cool for hours. Only complaint is that when I received them in the mail, one had a good sized dent. Not enough to pay return shipping, but enough to be annoying. Overall, a great buy.

5 5

James Sanders

Member since 
Groups:

I can't say enough about these bottles they're awesome. I remember my old thermos when I was a kid said "keeps hot hot and cold cold" they got nothing on hydro flask. It's no wonder I heard the military was starting to buy these. I just hope that the military colors will be available to the public soon.

5 5

ianmccanless

Member since 

I love this bottle, so much so that I've bought a second. I keep strapped to the outside of my pack while skiing and my tea stays hot until dinner.

3 5

redefiner_681528

Member since 

I just don't get it. Why would you make such a wonderful bottle and then it leaks?? Does anyone comprehend this? I sure don't. It's so amazing then it squirts fluids allover my seat?

Other than that, keeps my liquids piping hot, or ice cold. Whatever I need. I just have to keep it upright until I figure out what's going on. Almost perfect. What's up?

gretchener572711

Member since 
Responded on

You might want to check for cracks in the lid, under the gasket. I have a 21 oz bottle that worked great until 2 months after purchase when it started leaking if on its side. I checked the lid and found a crack underneath the gasket, so contacted hydroflask and they sent me a replacement lid free. It is such a great product and their customer service is excellent

3 5

Rita Palmer

Member since 
Groups:

So I'm taking back my five stars. Took this waterbottle to Saint George and it fell 50 feet hit a side of slot canyon wall, and landed in water. Was stoked nothing was wrong no leaks no cracks no dents in the bottle, just little scratches. No big deal for that kind of beating. Then I bring it back to work it gets knocked off a small table falls right on the lid and cracked the lid instantly. So over all I am very satisfyied with the waterbottle, it is by far one of the best I have ever had. Water stayed cool after 8 hrs in the sun while everyone else was choking down hot water, I was enjoying mine(yes I did share). If why would fix the lid then I would give it 5 stars again. The plus side is you can buy new lids on the Hydroflask website for 4+shipping, I would just rather have a product I don't have to replace anything on. Despite the lid problem I will still be buying more products form them.

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