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  • Platypus - Hoser Hydration Bladder - One Color

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  • Platypus - Hoser Hydration Bladder - One Color

Platypus Hoser Hydration Bladder

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    • One Color, 1L
      sale $17.21
    • One Color, 1.8L
      sale $16.75
    • One Color, 2L
      sale $18.71
    • One Color, 3L
      sale $19.46

    48 Reviews


    A BPA-free hydration bladder for your hiking backpack.

    You have a backpack and you'd love to stash a water reservoir with a drinking tube in it for quick, hands-free hydration on the trail. Grab the Platypus Hoser Hydration Bladder. Platypus made this reservoir with 100% BPA-free material, and added a SlimeGuard antimicrobial treatment to the inside so you won't end up with unidentified black bacteria camping out in your water bladder. The HyperFlow bite valve hooks you up to fast-flowing water, while the modular design fits into most backpack hydration sleeves.
    • Item #CAS0446

    Tech Specs

    BPA-feee plastic, SlimeGuard treatment
    [1L] 34 oz, [1.8L] 60 oz, [2L] 70 oz, [3L] 100 oz
    Recommended Use
    hiking & camping
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    great bladder

    • Familiarity: I've used it several times

    I bought the 3 Liter bladder for my pack and its been a go to on any trip. It has an easy squeeze mouth piece and has a nice clip feature that easily clips to my pack straps so I don't have to go searching for the hose.

    Super thin

    • Familiarity: I returned this product before using it

    Returned this before using it, because the material was so thin. I've had hydration bladders leak before, and I didn't want to take the risk with something that felt like glorified plastic wrap.

    Great for water filter use

      this thing works perfect for filling from a water filter. Just attach a quck disconnect or take off the mouth piece and attach filter, pump, drain, or squeeze (depending on filter) the water in until full. I chose a setup that saved me both weight and money, here it is.

      Platypus Big lip 2L (filter bag/dirty water)
      Sawyer mini water filter
      Platypus Hoser 2L (clean water)

      Total cost $80
      Total weight 11.1oz less if you take out the extras for filter

      I fully trust in platypus's systems and warranty, as well as these reviews which seem accurate. All great reviews besides a couple people that got a defect and can easily swap out for a working one, or exchange it right here on backcountry because there awesome too!!

      My Go To bladder

      • Familiarity: I've put it through the wringer

      I have this in the 2L for my trail run pack and a 3L for my hiking daypack and it has never let me down. Easy to use, light, easy to clean, and the hose works well. Have never had any leaks and fits in all packs I have put it in.

      Faulty when delivered

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

      This bag split open along the side the first time I attempted to fill it. It appears that the seam wasn't properly bonded when manufactured.

      I like it.

        I bought 2 of theses for a 2 day hike. Both worked well. no leaks, no problems. hose is a nice length, not too short not too long. No frills here, just a basic water sack, which is really all you need.

        Hydration is a Full Time Job

        • Familiarity: I've put it through the wringer

        I live in the desert and I'm super active. Not easy to keep up with hydration. I fill this every night and keep it by my head, because if I don't even have to sit up I will actually drink when I wake up thirsty. I also carry it every time I hike somewhere short just to catch up with hydration. Great when driving long bumpy dirt roads too....

        good bladder

        • Familiarity: I've used it several times

        I like it so far. Some times you feel like your sucking a tad too much air. But i have never owned another bladder so... Water tight seal so far, and I like it.

        you may be using it with the hose connection at the top? If so, you want it at the bottom for water only or squeeze the air out prior use (recommended). Then you can drink from it with the bag oriented any which way.

        Pro Tip: add in a quick disconnect and fill from a sawyer water filter for hiking. then you never have to use the small opening to fill with.

        Hoser Design Flaw

        • Familiarity: I've put it through the wringer

        In the early days, the 2 liter Hoser had a flat bottom so you could conveniently set it on its base for filling (like the platy bottles have). This was a positive feature which reviewers liked. The newer version of the Hoser has the ridiculous new "floppy tab" bottom (I am guessing it is cheaper to make) and now they will not sit stably on the ground for filling. This is a massive design flaw, which I have brought to CD's attention in the past, but it's being ignored. They need to bring back a Hoser with a flat base (like the bottles), or I will have to switch brands. Too bad, because everything else on this product is good.

        3L Platypus Hoser Rocks!

        • Familiarity: I've put it through the wringer

        I'm a big fan of Platypus products (see my reviews of their GravityWorks water filtration/storage system, Platy SoftBottle water bottle and Shut Off Valve). I bought my Hoser in 2009 and went with the 3L version (3.8 oz) because it's nearly as light as the 2L and 1L versions (3.6 and 3.2 oz, respectively). For comparison, CamelBak's 3L Antidote Hydration Reservoir comes in at 7.0 oz. When I backpack, I try to limit water-weight and carry only 1L at a time. With the 3L Hoser, I have flexibility to carry more, if needed (i.e. if water sources are fewer and farther in between). I used a black Sharpie to add marks indicating when I've filled bladder to 1L or 2L (see pic). Otherwise, you need to add water to bladder and then cap and invert to see how much you've got!

        I only carry water in my hydration bladders (no Gatorade or other energy mixes, etc.) and I clean and dry thoroughly immediately after each trip - so far, no "funk" problems for me. In my experience, Platypus products are very durable - mine take a beating and I've never had a leak. These bladders are highly recommended!

        3L Platypus Hoser Rocks!

        Failed on first big trip

        • Familiarity: I've used it several times

        I purchased the 2L and used it several time with 1 liter. Put 2L in it and 150 feet out of my car going into Congaree NP in started leaking. Unpacked my GG Crown VC60 and found that the lower corner of the hole that you hang it by had pulled apart. Had to hand carry it 6 miles to camp. Not sure if I'll try another, truly liked it.

        simple and effective

        • Familiarity: I've used it several times

        This bladder is simple, effective, and priced correctly. Its simplicity cuts ounces compared to other versions on the market. They don't last forever, but I've enjoyed using this product on all of my hikes.

        Unanswered Question

        Can anyone tell me which is the best way to clean one of these, please.

        What are the dimensions of the bladders?...

        What are the dimensions of the bladders?

        I'm surprised this information is not listed.

        Best Answer

        Hey Griegor

        Thank you for your question! I found the information below from Platypus's product specs on their webpage.

        1 Liter: 5.25" x 11.5"-- (13.5 x 29 cm)

        1.8 Liter: 6.75" x 11.5" -- (17 x 29 cm)

        2 Liter: 6" x 16" -- (15 x 40.5 cm)

        3 Liter: 7"x 16.5" -- (18 x 42 cm)

        I woule like to know the dimensions of...

        I woule like to know the dimensions of each

        What size is this bladder? 3 litres?

        What size is this bladder? 3 litres?

        Oops - Just found out - one more click & I found sizes & prices - thanks! I have the 2 litre one and love it - but it ain't big enough for a day hike in the ozzie tropical rainforest where i live so want a 3 litre one also. Thanks.

        Unanswered Question

        Will the 2 L model work with a Black Diamond...

        Will the 2 L model work with a Black Diamond Magnum Pack, or should I just go with a Camelback combo? I don't want anything too large.

        Anyone know the weight (without the hose)...

        Anyone know the weight (without the hose) of the 3L? If someone could post weights it would be pretty awesome and you would be my hero.

        I am wondering what size the fitting on...

        I am wondering what size the fitting on the bag that attaches to the it like a 1/2'' male threaded fitting? I am looking to use it for not the typical usage and I think it would work well if I can easily attach and detach it.

        My puppy got ahold of my 2 liter platypus...

        My puppy got ahold of my 2 liter platypus bladder. Can I replace just the bladder - I don't need the other parts? Thanks.

        I have a platypus bladder and it is now...

        I have a platypus bladder and it is now leaking. How do I go about getting it warrantied? I am in australia but bought my bladder in canada. Any advice?

        Best Answer

        I'd start out by trying to find a local dealer, they should be able to help you out. If that doesn't work, contact Cascade Designs directly. you can isolate the leak, Platypus has a patch kit, if you can find it, that seals most small leaks. It could be a temporary fix until you work out the warranty details.