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Klean Kanteen 40oz Classic Water Bottle with Loop Cap


Item # KLN0012

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Item # KLN0012


Satisfy a big thirst away from home with the help of the Klean Kanteen 40oz Classic Water Bottle. Made from food-grade stainless steel, this extra-capacity bottle offers an eco-friendly, health-conscious way to stay hydrated when you're on the trail, on the water, or at the gym.

  • Food-grade 18/8 stainless steel is highly durable and easy to clean
  • Uncoated interior and threads won't peel, leach chemicals, or impart/retain odors and tastes
  • 1.75-inch mouth opening allows ice cubes to pass but won't slop liquids all over you if you're drinking on the go
  • BPA-free polypropylene Loop Cap is leakproof and enables you to clip the bottle onto your pack or messenger bag
  • Rounded corners are easy to clean with no hard angles where dirt, germs or bacteria can take hold

Tech Specs

stainless steel (18/8 food-grade)
40 oz
Claimed Weight:
(without cap) 9.4 oz
Recommended Use:
camping, backpacking, boating, work
Manufacturer Warranty:
1 year

Reviews & Community


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For Extreme Thirst

  • Familiarity: I've put it through the wringer

This is bottle is better than the 1 gallon plastic jug I've been reusing. You can also pack it full of almonds. TBD: Cashews.

great bottle

  • Familiarity: I've put it through the wringer

i use it every day at work, i would definitively recommend this.

Elegant and durable

    Great product! I use it almost every day, both on my hikes and in the office!

    Great product, worth buying

    • Familiarity: I've put it through the wringer

    Bottle cap is the same as of the standard klean kanteen bottle, the bottle itself is light for its size, well balanced, fits most side pockets of my daypacks but a bit tall for them.
    No leaking and smells.
    Used it almost dayly in summer, like it a lot, have smaller bottles and they all perform great.

    Great size!

      I have found this 40oz size is great -- no running out ! Like all Kleen Kanteens it does require that you pay attention when screwing on the cap, but other than that it's great, water without the metallic taste.

      Durable and Dependable

      • Familiarity: I've put it through the wringer

      This is a great water bottle for everyday use. I love the size yet it's not too awkward to carry around on your finger. The water never tastes funky to me, which is a victory with metal water bottles. Overall, fantastic basic water bottle I highly recommend for light and heavy use. I also LOVE the company and what they stand for, they provided free water at Floyd Fest last year which was crucial for all in attendance. I know what kanteen I'm bringing this year!

      Great Bottle

      • Familiarity: I've used it once or twice and have initial impressions

      This bottle rocks, coming at 40 oz. it's a pretty large water bottle which is great for being outdoors where you don't always have access to clean drinking water. I really like Klean Kanteen's design, a single wall of stainless steel. It's a minimalist approach but will keep your water cold for most of the day. I'm really stoked on this bottle, I'm going to use it for everything.

      Great camping bottle

      • Familiarity: I've put it through the wringer

      I have had this Klean Kanteen for 8 years and have had many come and go throughout the years. You can beat this bottle up and it will just make it look better. The cap seals crazy well and you will not have to worry about it leaking. No plastic tasting water from this bottle, only the freshness.

      Camping tip/trick: Right before going to bed fill up your Klean Kanteen 3/4th full and take the cap off. Set the bottle close to the fire for a little while and let the stainless steel heat up. Make sure to keep the cap off while heating up because the cap is the only part that will melt. Take the bottle away from the fire with some gloves and depending on if it is too hot let it cool down a little and put the cap back on. Then bring it over to you sleeping bag and throw it in the bottom for a little foot warmer.

      Eric Watford

      Expert Gearhead


      Instagram: @ericwatford

      Great camping bottle


      • Familiarity: I've put it through the wringer

      You can't beat this solid stainless steel classic. Whatever environment you can endure this thing can endure twice that! Dents (but never cracks) only add to the stories that it is going to carry throughout its journey with you.

      Clean Taste

      • Familiarity: I've put it through the wringer

      I've gotten hooked on the metal water bottles, as they don't have any funky taste with them. Even if you use other liquids in the bottle, super easy to clean out with no residual funk. I like the larger size with the smaller mouth- makes it a whole lot easier to drink out of while moving! The cap is super easy to get on and off, and doesn't leak- which is great as I find the bottle is usually on it's side since it doesn't fit standard cup holders.

      Excellent bottle.

      • Familiarity: I've put it through the wringer

      No plastic taste and a much better neck design than the Sigg bottles (easier to clean both inside the bottle and the thread).

      Own Two

      • Familiarity: I've put it through the wringer

      I bought a second because this seems to be the only bottle that doesn't leak after years of use. The paint always scratches off, but that's why I have stickers. Recommend this brand over almost any other water bottle company.

      dents easily

      • Familiarity: I've used it several times

      I love the large size of this bottle but it arrived damaged... with a sizeable dent on the bottom. Because I needed it right away for a trip, I decided to just keep it instead of returning it and having to find a new bottle. I am assuming it was dented in transit, since I can't imagine whoever packed it would send out something so obviously damaged.

      Bulky but great

        I have more water bottles than I really need, but I get a lot of use out of them. I generally always have a water bottle at my side. I usually drink out of bottles at home instead of glasses/cups. I really like the 27oz. Klean Kanteen as an all-purpose bottle so I figured I'd try the 40oz. as well. The capacity is nice, and it's the great quality stainless you know and expect from Klean Kanteen. The colors are great - vibrant and shiny. KK uses non-toxic paints, if that matters to you. Overall it's a fantastic product, the only reason I don't use it as much as the 27oz. is that it's just bulkier - doesn't fit in many cup-holders, etc. But what do you expect with 40oz.? I mostly use it as a bedside/around-the-house water bottle.

        Fresh and tough

          This bottle has survived a lot. it has survived everything from rockfall to falling from rock. its TOUGH. it wont dent (as much) as other bottles and it tasted great! its also huge! its definitely worth the price!

          Fresh and tough

          For your big water needs!

          • Familiarity: I've used it several times

          I drink a lot of water. At my desk, I used to have two 27oz. Klean Kanteens to handle my demanding thirst and reduce the need for trips to the water cooler. The 40oz is a great way to consolidate. The thing is big and heavy-duty, with the same opening as the 27oz. bottles. Maybe not the best for hiking/backpacking trips, but perfect for around the home or office.

          For your big water needs!

          40 oz. to Plastic Freedom!

          • Familiarity: I've put it through the wringer

          Klean Kanteen pretty much makes up all of my water bottle collection now. I love the 40 oz size, it's lightweight, dishwasher safe and durable as all hell. I believe that they're available in all sorts of colors but I'm partial to the chrome. The loop on the lid is tough and functional, perfect for clipping onto a pack or even your belt. Goat Stickers look great on it too!

          40 oz. to Plastic Freedom!