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  • Osprey Packs - Hydraulics Hydration Reservoir -

Osprey Packs Hydraulics Hydration Reservoir

Temporarily Out Of Stock

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

Can't wait? Consider one of the other Hydration Bladders we have in stock.

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72 Reviews


Custom-fit suspension systems are Osprey's bread and butter, so it makes sense that the Hydraulics Hydration Reservoir is shaped with a rigid backer plate to prevent any interference with how your pack fits and carries. The durable MPE reservoir material keeps water tasting exactly the way it should, and the magnetic bite valve keeps the hose secure when you're cruising up the trail.

  • Metallocene PE reservoir material is exceptionally strong, taste-free, and BPA- and PVC-free
  • Antimicrobial formula keeps mold and bacteria away
  • Wide-mouth cap is easy to fill and has a 3/4 turn for quick and secure closure
  • Front handle makes the reservoir easy to fill and insert into the pack
  • HydroStatic backer plate allows the reservoir to maintain a low-and-wide profile, preventing interference with your pack's suspension
  • Magnetic bite valve with included sternum strap magnet keeps the hose secure when hiking
  • Bite valve can be quickly closed with a 180-degree shut-off valve
  • Flexible 1/4 inch water hose increases flow for satisfying thirst quenching
  • Item #OSP0297

Tech Specs

[2L] 70 oz, [3L] 100 oz
Claimed Weight
[2L] 10.6 oz, [3L] 10.9 oz
Recommended Use
Manufacturer Warranty

Tech Specs

  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

Great Bladder

  • Familiarity: I've put it through the wringer

This is my second hydraulics bladder and I love it. It is a perfect size for my Osprey Kode 32 backpack which I will use on longer day hikes and sometimes biking. They are very durable and provide me with enough water to get through my daily activities while not taking up to much room. The bladder material is tough enough to withstand a lot of abuse and it did not have that weird plastic taste to it the first few times you use it.

Best got better

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

I bought this to add to my Osprey Kid Carrier which came with a hydration slot but no bladder. I have an older Osprey Raptor 14 pack that I use when mountain biking, so I'm already familiar with the previous generation of this bladder. The best feature of it is the magnetic mouthpiece and corresponding clip for the sternum strap. It's so nice having a convenient way to keep the hose from dangling. The on/off function is also, IMO, better than any other brand's. The bite valve itself isn't as good as Camelbak's and seems unnecessarily complicated, but I suspect this has to do with a Camelbak patent. This has a stiff backer plate on it that helps keep the bag from bowing out agains your back when in a pack. It's a very nice feature, but it's not as stiff as the previous generation was. I assume this was to bring the weight and production cost down. This change and the zip top do make it easier to put a can of beer in the bladder, though. Fill the bladder with ice water and stash a beer in it. You'll have water on the hike up and an ice cold beer for the summit.

Hydraulics Reservoir

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

After using this reservoir I think I'll stick with Osprey in the future. It packs in a lot of small features that you don't get from other brands like the front handle, which makes it super easy to fill and pack, and the backer plate allows it to slide effortlessly into your pack. Plus the magnetic bite valve is a must. Compared to my old reservoirs this one is much higher quality and hands down a more durable reservoir. Thanks for your ingeniousness Osprey!

Best bladder

    This is the best bladder I've used. The stiff plastic backbone allows the bladder to hold its own weight so it doesn't sag to the bottom of your pack. The bite valve allows for quick, high-flow drinking without too much effort, and closes when you rotate the valve. My only complaint is that it is easy to cross-thread the cap and sometimes the bladder will leak a little water for no apparent reason.


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

    This reservoir works great! Very durable and easy to carry/insert into backpack. Only con is that the screw top is sometimes a bit finicky when tightening.

    LEAKS !

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

    Used it one time on a hike in Hawaii and this thing leaked from a seem at the bottom and drenched the entire bottom of my pack.

    Argghh!!! I am so sorry! Please know that this is so, so rare, but as with any product, stuff happens. I will tell you that Osprey will replace this reservoir with their updated version, but they won't have them until later in the spring. I am so sorry!! Thank you for letting me know!

    OSprey Rep

    Big reservoir

      The 3L is really big. Haven't used it yet but I put it in my pack, the kestrel 38. Fits perfectly. The quality seems pretty high. I'll know more once there is water in it... Only down side is it is a little pricey.

      Hey JJohn. I think you will really like this reservoir. The price is only $.95 more than our favorite competitor, and the Osprey reservoir has WAY more features: Backpanel so it doesnt ball out on your back, locking bite valve with magnet sternum strap included, etc.


      Osprey Rep

      Easy Refilling

      • Familiarity: I've used it several times

      I love the bladder mostly because of the HydroStatic backer plate. It makes filling and sliding into a pack super easy.. I mean easy! There is no pushing this floppy bladder into a tiny sleeve like trying to fit into your favorite jeans from high school. The plate makes the bladder rigid so it slides into an already packed backpack with ease. The plate also keeps pressure on the bladder which in turn helps with water pressure and makes it a ton easier to drink and you don't have to fight to get the water through the hose when getting low on water..

      If anyone has further questions, contact me directly and I would love to help you get the best prices/gear advice. My direct email is skdavis@backcountry.com. Feel free to hit me up anytime.

      Skylar, thank you for the great review on this reservoir. The back plate is a fantastic add to the run of the mill reservoirs that everyone other brand has. Osprey is about doing things differently, and hats off to them for this design!

      Osprey Rep


      • Familiarity: I've used it several times

      I own a first generation Osprey Raptor pack. My bladder was needing replacing so I bought this. The 1st gen was made by Nalgene and was well constructed and had all the cool bells and whistles that everyone loved. Opsprey took those things(magnet,stiff back, large filler hole) and incorporated them into a bladder Nalgene is no longer making and my guess is outsourced it to China. The new one sucks compared to the old one. Here is specifically why:
      -They made the hose diameter smaller so it "flows" less water
      -the bladder itself is wider and and flatter. The old bladder was less wide and expanded outward (away from your spine) as it filled
      -The "stiff back" is much more flexible making it harder to put back in the pack especially when both pack and bladder are full.
      -The plastic spine is cheap and brittle
      -The cap does not thread onto the bladder easily and often cross threads
      -The cap used to have a large loop that you could grab to pull the bladder out of the pack. Its still there but too small to grab easily.
      -The plastic loop that attaches the filler cap to the bladder is too stiff and wants to remain close to the threads. You have to hold it out of the way of the faucet water to fill it which is annoying.
      The old bladder was awesome. The new one totally sucks. Anyone giving this good reviews doesn't know any better because they have only owned this piece of garbage. I'm super bummed they changed it!

      James, Thank you for taking the time to write. There was alot of thought put into the new reservoir, and we had to change because Nalgene was getting out of the business. The new reservoir is made with our partner factories in Vietnam, and as I said, there was alot of thought put into it. The original weight of the res needed to be reduced, the original hose was not compatible with industry filters, and the width increased so that the weight of the water was closer to your back, and not away from it, which is a good thing.

      Issues which Osprey has already addressed on this current reservoir are the cap loop and the threading. We have heard those issues and have remedied them... perhaps the one you have does not show those updates.

      So, I am so sorry that you have not been happy with this reservoir, I really have expereinced myself great things about it, and I know others have as well. And I am sorry that you don't have the old reservoir that you loved to fall back on. It's tough when companies change things, but please know that Osprey really did address some key issue from the old to new reservoir.

      Thank you again for the feedback,

      Osprey Rep

      Best Bladder

      • Familiarity: I've used it several times

      I just bought this to replace my old Camelbak bladder. Much better from the built in support of the bladder to spread the weight across your back, to the taste of the water coming out. I use this in a Camelbak backpack and it works great. Recommended!

      Doesn't taste bad

      • Familiarity: I've put it through the wringer

      The thing I've loved most about this bladder is that it doesn't make my water have a bad taste like many other bladders have in the past. I have loved the magnetic bite valve so that the tube is not moving around while I'm hiking or riding.

      Girlfriend can't open or close it

      • Familiarity: I've put it through the wringer

      Bought this for my girlfriend and she cannot open or close the thing. I struggle opening and closing it for every refill. Ended up soaking her and all the packs contents several times because it wasn’t closed all the way. When properly closed the bladder works great…

      I owned/own several osprey bladders and never had this issue. They seem to have changed the design on this one making it a pain to open and close.

      Russell, thank you for writing. I am so sorry this happened. I am guessing that you have a defective reservoir, because this has not been an issue for Osprey. go to ospreypacks.com/warranty, and they will replce it.

      Thank you again for writing and giving us a chance to fix the issue.

      Osprey Rep

      Hi, Leta....Actually, if you do a quick Google search on the 3L Osprey bladder, you will find that it IS a continuing issue....for lots of us. I have this exact reservoir and I love it...except that I struggle to get the cap on and off without it leaking. On several occasions, I've thought I had the cap on correctly (because this should not be a hard task - and I test the seal by moving the container around in many directions) and the water leaked into my pack and onto my supplies. It sounds like this is a faulty design because so many of us are having the exact same issue.

      Nice for the pack!

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

      It is super convenient to have this attached to my back. I like how much water it holds, and like how the mouth piece works. I have to pump water into a nalgene, then transfer it to this bag, but it isn't that big of a deal.

      Mmmmmmm Water

      • Familiarity: I've put it through the wringer

      I drink a lot! Of water. This reservoir works great and will last a long time. I would suggest getting a insulated hose sleeve for winter and summer.

      The description on this page is from older version, but the picture is from the new version that is coming in spring 2016 per Osprey web site. Could you please let me know which one you have in stock? Thanks

      Does this bladder really make the water taste-free? I had a couple of others that claimed the same but the water tasted like plastic anyway .

      I have never had bad taste from any of the three Osprey bladders I have owned.

      I asked my 11-year old - who also backpacks with me, and she said the only time she has ever had it taste funny was the time she left it on the rocks soaking up sun on Isle Royale - after several hours laying in the sun, she said that the water was "warm and ikky and tasted slightly plastiky."

      I don't leave mine on rocks in the sun, and have never had that issue. LOL

      Anyone recommend a compatible cover for the bite valve?

      Hello Friends,

      Will a 3 liter hydration reservoir (bladder) fit a Ospry Raptor Pack 10?

      Best Answer

      Hi bq of SoCal,

      The specs on the Osprey Packs Raptor 10 Hydration Pack - 610cu in show a reservoir volume of 100oz so that will work perfectly with a 3L Osprey Packs Hydraulics Hydration Reservoir :) I just purchased the 3L and love it - let me know if you have any questions about it!



      Does anyone have any experience on how...

      Does anyone have any experience on how this performs under snow/cold conditions? I'm planning to utilize my backpacks pouch and go snowboarding with this reservoir. Am I better off with an insulate bladder?

      Any help would be much appreciated.

      Best Answer

      Usually the bladder won't freeze as its against your back and there is a lot of movement in there. The bigger issues is the hose freezing. Insulating the hose helps somewhat and blowing the water back into the bladder after drinking (so it is not in the hose) also helps but if it gets cold enough, it'll freeze. I have found that to be the case with every type of hydration bladder there is.

      One thing I have done on mine is add the Camelbak quick connect conversion adapters so I can switch out the hose for the insulated Camelbak one. I still always try to remember to blow the water back. With my hydration pack I have really only noticed freezing hoses when it is extremely cold so it is not usually an issue every time you go.

      Will this fit in a North Face Terra 45...

      Will this fit in a North Face Terra 45 Pack?

      does the fill cap go towards the inside...

      does the fill cap go towards the inside of the pack or towards the persons back?

      Also, a word about the 'cap': I and a friend of mine just got Osprey packs back in March, 2013 (I got the Raven 14 & he got the Raptor 14), absolutely love theses packs...the best...but now the caps keep wanting to cross-thread, where the cap itself, and the plastic "hinge" that holds to the pack makes turning the cap difficult. You end up having to try to balance holding the 'hinge', trying to turn the cap 'just so', and trying not to spill water everywhere, even my friend has a bit of a 'struggle to get the caps to tighten down correctly. I recently read on the Osprey Raptor section of another customer complaining about the same exact thing. These were not left in a hot car, nor any hot water inside them where the plastic could have been warped somehow. It's just poor threading on lid and collar. May not be a problem with all, maybe just a bad-run from the factory. Just be aware that this may be a problem. (this is for the 2013 models). I have contacted Osprey and waiting for a response. May return to B.C., but hate to do without my pa


      *So, if you experience this problem with yours, try holding the plastic hinge that connects the cap to the collar, and then turn the lid...it helps.

      Why on earth did they change the delivery...

      Why on earth did they change the delivery to 1/4 inch what a way to ruin a great produce I will never recommend osprey again sorry but this was a BAD BAD move does anyone know why this was done?

      The 1/4" makes it way more versatile. Osprey hydration accessories are almost non existent so this change allows the use of other brand's accessories such as CamelBak and Platypus. I added a CamelBak quick connect to mine so now I can use a CamelBak tube or other accessories such as the tap filter. It also allows me to connect my filter right into the tube and filter water a lot easier.

      Another fit Question: Will this fit in...

      Another fit Question: Will this fit in Osprey Sirrus 24, women's?

      will this fit the Osprey Aura 50 bladder...

      will this fit the Osprey Aura 50 bladder pouch better than the camelbak res? felt like I was gonna bust it cramming it in there. wife did mention she could kinda feel the bladder the first day up the trail when it was full.

      It should fit any backpack. I was walking through REI and saw some Osprey hydration packs and decided to check them out. Even the 15L packs came standard with the 3L res. I have noticed difficulties putting it is after you have packed your pack as well. What I found that works is filling the res and putting it in then packing around it to create a little pocket for it. Then as you take it out to refill hold the pack so the load doesn't shift. Another option for refilling is the get the camelbak quicklink kit and most filters have adapters that you can just snap right into it without taking it out of the pack.

      It should fit any backpack.  I was walking through REI and saw some Osprey hydration packs and decided to check them out.  Even the 15L packs came standard with the 3L res.  I have noticed difficulties putting it is after you have packed your pack as well.  What I found that works is filling the res and putting it in then packing around it to create a little pocket for it.  Then as you take it out to refill hold the pack so the load doesn't shift.  Another option for refilling is the get the camelbak quicklink kit and most filters have adapters that you can just snap right into it without taking it out of the pack.

      I also find that after filling your backpack it can be slightly difficult to get the hydration system in the pack. Having the Osprey bladder will definitely be easier than the Camelbac because it has a rigid back. For all of my Osprey packs, even if the zippers will hardly close because they are so full, I can always jam the Osprey hydration bladders into the sleeve.

      Do these new bladders have the rigid back...

      Do these new bladders have the rigid back like the hydraform?

      Does this work with the 36L Manta...

      Does this work with the 36L Manta backpack?

      the 2L or 3L? either way they will work almost any backpack. I have fit the 3L one is my daylite daypack. You might need to put this is before you pack your bag too much just to make sure it has room to settle in the hydration pouch. Then you can cram in everything else you want to take.

      Are those the new Osprey Hydraulics or the...

      Are those the new Osprey Hydraulics or the old Hydraform? The picture looks just like the old Hydraform but it might not be the product in the picture. The new Hydraulics is supposed to be blueish color. Looks like by the description this is the new one, but I wanna make sure before I buy.