Get It Before Labor Day Weekend—Order With Free 2-Day*by 5pm MT 9/2/15

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

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Osprey Packs Hydraulics Hydration Reservoir

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Here's what others have to say...

4 5

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.

5 5

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.

Unanswered Question

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 .

5 5

Love it

  • Familiarity: I've used it several times

Fits in my Osprey pack perfectly. And I love the lil' magnetic end that keeps it secure :)

5 5

Great hydration reservoir

  • Familiarity: I've used it several times

I bought this to use with my Osprey Aether 60 pack and my Talon 33 day pack. Usability and durability seem great so far - no complaints. It is best as an on-the-go water source for one person rather than something to use once in camp where you may want something that lends itself more to sharing, pouring, etc. Consider what size you want - 3L is probably more than I needed given my water consumption even during a strenuous hike.

5 5

Where have you been all my life?

  • Familiarity: I've put it through the wringer

So I made the mistake years ago by just buying the cheapest bladder on the market, thinking they are all the same. WRONG! This bladder is amazing and I will never go back to off brand, cheap product. Osprey thinks of all the little details. The handle makes it super easy to fill up and the locking valve is great. This also comes with a magnetic piece which is nice if you don't already have one. I highly recommend this bladder! Good Job, Osprey

5 5

Great Addition

  • Familiarity: I've put it through the wringer

I recently was charged with outfitting my group (wife, sister, brother-in-law, brother, sister-in-law) with gear for a week long trip in southern utah canyon country. We got tents, sleeping bags, stoves, backpacks, the whole run. All of our gear held up and served us well.
The Osprey Hydration bags were great additions to our backpacks. There were a few different hydration bladders in the group, but Osprey's added rigidity helped keep it in place and keep all of the water accessible, not folded over and behind a flimsy bladder.

5 5

Great flow.

  • Familiarity: I've used it several times

Excellent product great flow and the flat design makes it very comfortable to carry. If you're carrying it in a different brand pack make sure it has a wide bladder pouch.

5 5

bought as a gift, works great

  • Familiarity: I gave it as a gift but have feedback to share

Bought for my gf, and she's happy. so i'm happy.

4 5

Again, the cap...

  • Familiarity: I've used it several times

Like others have commented, at least with mine, the cap has to be torqued about as tight as I can possibly make it. I learned this after packing my Osprey Aether 70 and noticing a puddle forming below it on my hardwood floor! Problem is, it's then extremely difficult to UNscrew the cap. I may try the olive oil tip and/or ask Osprey for a replacement cap.

5 5

Best Bladder on the Market

  • Familiarity: I've used it several times

I have used a number of bladders, including the classic Camelbak bladder, and after using this one I won't ever go back. I have been using Osprey Packs for years and love how they are pretty much all equipped to carry one of these bladders. The easy fill handle is great, it helps orient the bladder so that you can efficiently fill it, unlike the Camelbak, which flops all over the place. This bladder also has a built in plastic back panel which gives the bladder some structure and also serves as reinforcement for the back panel in your pack, together they form a seamless union, you wont feel a difference in how your pack fits regardless of if it has the bladder in it or not. The hose tube is a wider diameter than the Camelbak, so it lets you drink water faster if you so desire. The bite valve is great as well, and i love the locking mechanism, if you have the valve bent at an "L" it will let water flow out, but if you have it straitened out it will lock off the valve. One last thing that puts this system over the top is the magnetic attachment that holds the hose in place when you aren't using it. Just attach the magnet to your chest strap and the bite valve will automatically attract. Osprey thought of everything when they created this system and truly produced a superior product to all the other alternatives on the market.

Which water bladder fits i the med small osprey pack?

5 5


The 2 liter is ideal to put in seriously any pack. You can always put a bladder in the standard slot on an Osprey pack, or throw it in whatever pack you're using. I really like the mouth piece on Osprey verses Camelback. I like that, not only do you need to bite the mouthpiece, but also untwist the lock, so water doesn't leak. The overall bladder is higher quality by comparison as well. It just feels more sturdy. I don't ever stress about a possible puncture.

1 5

Is it raining again, because I'm soaked

  • Familiarity: I've put it through the wringer

Leaked a little the first time. Leaked a little more the second time. Completely emptied out on me the third time. I am in the military and used it on a frequent basis. The cap is a bitch-and-a-half to get on right. And even when you think you got it on, forget it you are gonna get wet. Along with everything you own in that pack. Look elsewhere for one that works well.. Unless of course you are looking to take a constant shower while packing around, and if you do decided to buy this make sure you bring soap. Might as well get clean while it empties out on you.

Is this compatible with the kestrel 48?

Responded on

Sure is! Either the 2L or 3L will work well for you in that pack!

5 5

An absolute beaut of a bladder

  • Familiarity: I've put it through the wringer

There are so many features on this bladder that make it darn near perfect. I have always had problems with bladders folding and the plastic plate on the back of the bladder makes it easier to put in and out of packs, easier to fill, and almost eliminates the struggle of getting water from the last third of your bladder. The over all design with the plate also keeps it very long and rectangular but super thin. Another great feature is the handle on the front. I cannot tell you how many times I dumped a full bladder of filtered water out onto the ground because it was hard to hold. The handle makes it easier to fill, easier to open and close, and guides the hose more efficiently. Probably the best part is the magnetic bite valve. Not only is it simple to use, but the magnet on the end makes it super convenient to drink from. All you have to do is hook the other included magnet to your sternum strap and feed the hose through the guides on your shoulder strap and bam. When you are done drinking the magnet holds it in a convenient place where it wont flop around. Also, none of that nasty plastic taste of regular bladders. You sip from this and what you taste is the water you pumped into it. Osprey did a great job with focusing on the little things when they made this bladder and it has made my life a ton better. I highly recommend picking this up and dropping any other bladder into the can.

4 5

no spineless guppy here

  • Familiarity: I've used it several times

Maybe my favorite hydration bladder that I have used personally. The drawbacks are far and few between, and in my mind are limited to the fact that off brand after market accessories are geared towards camelbak. Inline fill kits may not be compatible with the tubing right out of the box, and so on. However this bladders charms more than make up for this. First thing you'll notice is that this reservoir has structure. Which in my opinion makes it infinitely easier to fill and place in ones pack. This also keeps it relatively close to you back panel at all times. The lid closes easily with minimal likelihood of cross threading. Which I feel is an improvement on the short comings of competitors.

2 5

"I need a Urologist"

  • Familiarity: I've used it several times

" Bladder Rupture" "Kinked Hose" Seriously...its true!! I did get about a years use out of my reservoir. After my first month of use the tube kinked and would occlude flow about every other use... Very Annoying!!! After one year of use the outer portion of bladder had about 3 areas that had leaking cuts in the bladder from inserting it into a backpack. Didn't realize Osprey only had a 1 year limited warranty on hydration systems.. Oooops!! I should have returned it within the first year and bought something else.. I learned my lesson..

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

Best Answer Responded on

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!