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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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Review Summary
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16 4
7 3
2 2
0 1
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Osprey Packs Hydraulics Hydration Reservoir

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Here's what others have to say...

1 5

Leaked almost right away

I rode with this maybe 2 or 3 times before it started leaking and it's unuseable. Very unhappy with this product.

4 5

Great Hydration System!

  • Familiarity: I've used it several times

Pros: Integrates nicely into my Osprey Aether 70! Love the magnetic clip that connects to my pack and the handle that is built into the bladder.

Cons: A little pricey

3 5

It has its ups and downs

Up until last week, I loved this reservoir. I have the 3L one and I am in love with the magnet feature. It makes it really easy to drink while riding my bike, and it keeps the nozzle from flapping around.

Unfortunately, last week the cap stopped functioning. It has this blue ring that keeps the cap attached to the reservoir so you won't lose it, but for some reason that ring stopped being able to spin separately from the cap itself, leaving me unable to close the pack. I took that ring off and it functions, though it won't be long before my cap is lost.

Aside from that, I love this. The back of it is nice and rigid, so it feels okay to wear. It still gets rounded, naturally, but the rigidity helps.

Responded on

I found the same issue with my lid. It is not able to spin separately from the tab that keeps the lid attached. Otherwise I am very happy with it.

5 5

Stood up to Fitz Roy

  • Familiarity: I've put it through the wringer

I hiked all throughout Patagonia for 8-9 hours per day for 5 days and this bag got me through it. Terrific system.

4 5

Good bladder

I don't own an Osprey backpack for which this reservoir was made, but this fits nicely in my NorthFace bookbag and serves its purpose. The only downside is that it has plastic and magnetic attachments on the end that are bulky and incompatible with the NorthFace.

4 5

Great Bladder!

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

Pros: Bladder is rigid and durable. The backer plate is perfect. The magnetic bite valve is a heaven-send.

Cons: If you're not careful pushing the bladder into your bag you might disconnect the hose from the bladder. Also, the lid is a little tricky

5 5

Best bladder out there

  • Familiarity: I've put it through the wringer

This one has the best overall features of any bladder I've used. First, the bad: 1) drinking tube does not appear to disconnect from the pack for easy cleaning. 2) the plastic that connects the cap to the lid is too stiff so the cap gets in the way sometimes when pouring in water/ice, and you end up spilling stuff. Neither of which are that big a problem. The GOOD: The wide mouth. The rigid back-plate is AWESOME. This bladder can be used in any pack with ease - it doesn't slump and act all crappy like a lot of the other bladders out there. The handle on the front makes filling/emptying and loading/retrieving this piece incredibly simple. The magnet on the nozzle; if you are using this in the pack it came with, the magnet is a great feature/benefit, as well. Take a sip, clip the nozzle to the left side of the chest strap, and the tube doesn't bounce around and it easily retrieved. Another ingenious aspect to this unit.

I have several bladders & in order of functionality, they are:

Source Widepac 70oz - great concept in the Ziploc style to opening for easy filling/emptying, cleaning, and the plastic is rigid, so it holds it shape even when empty. Nozzle can be removed from the pack, a feature the Osprey desperately needs to incorporate.

Hydrapak 100oz - the top zip feature is, again, great. A zippable baffle makes cleaning easy, and it is freaking reversible so you can air it out after using it! The downside to making a bladder reversible is that it is very flimsy. Filling/emptying is easy due to the zip top, but loading a 1/2 - 3/4 full bladder is a pain, and it slumps as it is emptied in the pack. Removable nozzle; have I mentioned that Osprey needs this feature?

Camelbak Antidote 70oz/100oz - my least favorite by far; relatively flimsy, tough to reach the bottom of the bladder when deep cleaning, the crappy plastic nozzles are easy to chew through, and the cap system is AWFUL. a b*tch to line up & screw in. Much better systems out there.

4 5

Good replacement but beware of fit.

  • Familiarity: I've put it through the wringer

I bought this to replace my old osprey bladder from a couple of years ago because they switched hose sizes and I could no longer buy replacement parts with ease. Overall, the new bag seems more durable but the screw on cap is a little stiff at first making it difficult to pour in water. So I retro fitted this into an "older" osprey hydration bag for mountain biking and it barely fits due to the last reservoir having a smaller profile.

5 5

My Favorite Bladder

  • Familiarity: I've put it through the wringer

I am a huge fan of the Osprey bladder design. The bladder has a nice low profile shape which helps it avoid the sloshy waterbed feeling of other bladders. The rigid backpanel provides just enough of a frame to supplement any number of frameless daypacks. I also like that the lid is of the standard screw-on variety. It has a secure trustworthy closure that has never leaked on me yet.

3 5

Bladder Cons & Pros

  • Familiarity: I've put it through the wringer

Nice bladder overall, but if I could take a couple features from Camelbak's bladder and swap them out with those on the Osprey I would.
Cons: 1. Crappy lid (better doublecheck that thing is on their good or you'll find the back or your car or bag soaked. 2. Hose doesn't detach. I like Camelbak's lid and detachable hose much better.
Pros: 1. Magnetic bite valve is very cool. Nice having it at your chest instead of bobbling around. 2. Rigid back side of the bladder works well.

Responded on

Agreed on the lid being crappy, but for a different reason - it gets in the way when you are pouring water in. To solve this, Osprey should make the flap that attaches the lid to the lid loose and flexible so you can tuck it back while you pour in water / ice. As far as it closing, it's pretty simple - if the logo is at 12:00, it's closed. If the logo is at 6:00, it's closed. Any other position, and it is open, and will leak. I think the problem you are having is getting that little hanging strap caught in the threads when you close the cap. Gotta watch that thing!

Responded on

you can get the camelbak quick connect conversion kit and retrofit this bladder. I did this and it works great. Osprey also came out with a lighter version of this in 1.5L and 2.5L that has a detachable hose. I thought I put a pic up of mine with the quick link but I guess not I will have to do that

5 5

Super Rigid

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

This reservoir is terrific!

I haven't used it too much yet so cannot speak to its long term durability but so far so good. It is constructed with a rigid plastic back with allows it to hold its shape when full. That keeps me from getting that heavy feeling in the bottom of my pack from the water sinking. All of that construction without added weight!

Also, the hose line is nice and wide so you can get heavy water flow!

4 5

Not a Platypus but still descent

  • Familiarity: I've used it several times

I bought this because it fits my Osprey backpack. It's well made but obviously not as heavy duty as my Platypus Big Zip 3L (which I love, can you tell?) That said it's been on several trips so far, was used full most of the time, and did well in the pack. It does fit well (the solid back helps it hold its shape when full), and I like the bite-valve a lot.

5 5

Great features

  • Familiarity: I've used it several times

This hydration bladder is great. It has a nice bite valve and a little magnetic piece that keeps it from flopping around. The combination of the handle and lid make this really easy to fill. I use this in my atmos 65 when backpacking and put it into my framless daypack to give it some structure and stability when I'm summitting or just doing short day hikes. The fact that it is stiff is a real plus!

Will either, or both, the 2 or 3L fit in...

Posted on

Will either, or both, the 2 or 3L fit in the Gregory Z40 pack?

Responded on

Both will fit. Even smaller Osprey hydration packs come standard with the 3L.

Does anyone have any experience on how...

Posted on

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 Responded on

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.

Responded on

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.

5 5

wow so good

  • Familiarity: I've used it several times

I love this product I have always used camelbak and I'm glad I made the switch. I think it was a touch more expensive but I think it is worth the small extra cost. It is so well designed - it has a great handle to make filling easy, the bladder closing is much easier than my old camelbak, the rigid back enables the bladder to function well in my day pack that does not have a special pouch, oh and the cool drinking thing that stops the bladder from leaking. totally recommend it

Responded on

I'm a Camel Bak user as well and I think I am slowly making the switch to Osprey's products. I think the designs are well executed and they always have tons of more features. I strongly believe that the rigid back panel on the reservoir helps aid in comfort and security of the pack load.

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

Posted on

Will this fit in a North Face Terra 45 Pack?

Best Answer Responded on

It will indeed fit in the Terra 45. Just note the bigger the bladder, the less room for other stuff.

5 5

Best Reservoir Ever

  • Familiarity: I've put it through the wringer

I am a huge fan of the Osprey bladder. The design is very well thought out. The built-in back panel provides enough structure for my frameless daypack and yet is not bulky enough to be a nuisance in my backpacking pack. The Nalgene style lid has a very secure feeling closure.

5 5

High Quality Reservoir

  • Familiarity: I've put it through the wringer

I used this reservoir over the last week while hiking around Mt Rainier. Each morning I filled it up to 2.0 L, added some optimizer powders and sipped it to keep hydrated. Filling is very easy. With the large mouth, handle and consistent lid closure this is by far the easiest reservoir to fill. The hard handle and slightly ridged back plate made it easy to insert into a mostly full pack. At no time did I experience a drop of leakage. Not from the lid, the hose connections or any surprise squirts from the bit down nozzle. Closed position means closed. I used it with my Osprey pack and very much enjoyed the magnetic fastener for the nozzle to the right or left shoulder strap. Even when totally physically exhausted, I could easily find, sip and re-secure my hydration hose with out looking.

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