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Nothing quenches your thirst like a 40, the Hydro Flask 40oz Wide Mouth Water Bottle, that is. The wide-mouth opening works well for ice-cubes and easy pouring, and double-wall vacuum insulated construction means your stuff stays hot or cold.

  • Large (wide mouth) opening
  • Double wall vacuum insulated
  • Keeps hot up to 12 hours
  • Keeps cold up to 24 hours
  • BPA-free
  • 18/8 stainless steel
  • Signature powder coat
  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

Better Than Expected

  • Familiarity:I've put it through the wringer

Bought this primarily for the 40-ounce size. I can fill it to the top with ice cubes, then dump in a 17-ounce bottle of water and it fills perfectly. I refill several times during the day and am constantly opening /closing. Twelve hours later I still have to run hot water into it to get the ice out. This thing is unbelievable! My wife just tested it out and was surprised---had to order her one. Well worth the money spent. I don't normally say that too often anymore.

Supper Cool

  • Familiarity:I've put it through the wringer

This is the best water bottle i have owned. It keeps you cold drinks cold all day, perfect for summer and any desert hikes, and as well keeps you hot drinks hot forever. As we all know its pretty awesome when hiking in the desert and you have ice cold water but honestly I used this product more in the winter keeping my tea warm for all day backcountry skiing/snowmobiling. Overall this is a must for any outdoor enthuses, or anyone that works/plays in hot weather.

Beware of thieves

  • Familiarity:I've put it through the wringer

If you plan on buying 1 you will for sure have to buy 2.. a family member, significant other, co-worker, dentist, mailman, local bar tender, cat or dog, even your sweet old grandmas will want and need and steal your bottle.

This happened to me!
But no fear, I just hooked up each brother and sister, mom and dad with one of these sweet puppies.
40 oz of cold fresh protected water. They are perfect for night stand table, backpack, car camping! This one specifically will not fit in your average car cup holder but we offer PLENTY of other sizes, shapes, colors.
The options are endless.
This will not be my last purchase from Hydroflask
Don't be a victim of water bottle theft, just hook your family up and save the world a little with a re-usable bottle.

Leonardo DiCaprio will thank you for helping save the world.

What else is there to say?

  • Familiarity:I've put it through the wringer

Perfect water bottles. Keeps cold forever. I haven't done anything hot, I'm not a coffee guy. I have had ice last for 2 days while sitting in my car(during winter so that would add to the time). Easy choice, get one.

40oz. Wide Mouth Water Bottle

  • Familiarity:I've put it through the wringer

This is by far, and I mean by far, the most dependable water bottle I have ever used. It keeps your ice cold for days, hot water for days as well. I am downgrading this a star for the cost and the weight. It is pretty spendy for a water bottle at $40 + bucks, but it is pretty rugged, which is great for the back country. It is heavy. You can get holders for the bottle, but then you are looking at a total of $70 plus for the total investment. You decide if the bottle is worth it. I love mine and intend on using it for as long as it lasts.

Ice cold for days

  • Familiarity:I've used it several times

I love these new water bottles with the vacuum technology in them. It really makes drinking water enjoyable knowing that every time you crack the cap its just a cold flow of H2O. I have left this bottle with ice and water in it for days and the ice doesn't melt at all, it's incredible. I love the size of this one too, at 40 oz. it holds enough liquid to keep you hydrated for a few hours. I would recommend this product to everyone, because everyone needs to drink water to live and this makes it even better.

Amazing!

  • Familiarity:I've put it through the wringer

I now own five Hydro Flasks and i can honestly say that i will keep buying them, they are absolutely amazing for both hot and cold drinks. The 40oz bottle is by far my favorite, yes its heavy and big but for everyday life its great to fill with ice water or tea depending on the day and have it stay hot or cold all day long is such a large quantity.

Cold water is everything

    Being 25 days in a trip finally I have to said yes and gave up my favorite water bottle, everybody love it so I had no chance and I bought another one. I feel so nice about my Hydroflask when people didn't stop talking about how cold the water can be even within 7 hours out of the fridge.

    Betcha can't own just one!

    • Familiarity:I've put it through the wringer

    Hydroflasks are great! Bottles are insanely durable, and can keep you drinks cold for days, or hot for hours. I love the 40oz, fill it up with tea and use it as a thermos for those cold days out touring.

    Put some dents in it

    • Familiarity:I've put it through the wringer

    This water bottle looks better with dents. Drop it off your bike, pack, or out of your hands... it's fine. It holds temperature for hours. If you are putting hot liquids in it the outside of the bottle will not be hot. The lid never leaks. Not the lightest bottle but who cares. This thing is burly. Awesome colors. Everyone loves Hydro Flask.

    Put some dents in it

    Love it

    • Familiarity:I've put it through the wringer

    As a teacher all of my colleagues are obsessed with these things. The ability to keep things cool for so long is important to us, as we don't have the time or ability to be constantly be adding ice to our water throughout the day.

    I recommend these to anyone that wants to keep their cold drinks cold, or hot drinks hot... they perform flawlessly. And they even look dignified after being dropped and dented up!

    Anyone know the height and diameter of the 40oz bottle? Wondering if it will fit in the holder on my bag.

    Best Answer

    I don't have exact measurements, but I have mine in front of me as we speak (see photo). It's no wider than a Nalgene, but a few inches taller and more than a pound heavier when full. If you have an unusually shallow water bottle pocket, it might topple out, but otherwise should be totally fine.

    I don't have exact measurements, but I have mine in front of me as we speak (see photo).  It's no wider than a Nalgene, but a few inches taller and more than a pound heavier when full.  If you have an unusually shallow water bottle pocket, it might topple out, but otherwise should be totally fine.