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  • Backer plate shapes the reservoir to keep it low-profile so it won't interfere with the comfort of your backpack
  • Pour shield extends the collar to ease filling in shallow sinks and control pouring into pots or bottles
  • Includes a magnetic sternum strap that you attach to your backpack, giving the magnetic bite valve a place to rest when it's not in use
  • Bite valve offers fast, smooth water flow with a 1/4 twist on/off switch


View all Osprey Reservoirs

REI membership


Best Use Multisport
Reservoir Capacity (fl. oz) 70
Bite Valve Shut-Off Switch Yes
Wide-Mouth Opening Yes
Quick Disconnect Tubing Yes
Material(s) Metallocene PE Film
Dimensions 14 x 6 x 3 in. inches
BPA Free Yes
Weight 10.5 ounces
Rated 2 out of 5 by from Beware the quick disconnect site After reading the product reviews, I was very careful when packing my backpack to protect the red quick disconnect button from inadvertent pressure. This prevented all but one instance of disconnecting during a day of travel on a 7 day backpack. As stated by others, the location of this feature should be changed to make it easier to access from outside the pack when you might want to fill the reservoir without taking the bladder out of your pack. The stated method of disinfection requiring an additional kit is also not user friendly IMO. All my other bladders have been much easier to clean without special tablets and tube cleaning devices.
Date published: 2016-09-23
Rated 5 out of 5 by from Great design for the nozzle. There are two aspects of this Camelback that I want to shower praise on. 1. The nozzle is housed in this continuous piece of plastic that has no nooks and crannies that accumulate dirt and debris. This is a big deal, as anyone who has used a Camelbak for any extended period of time can attest. The drink nozzles on those things get pretty gross--not the kind of thing you want to put in your mouth. 2. The magnet that snaps the nozzle to your chest strap is such a brilliant little piece of engineering. I used to spend so much time fiddling with the hook on my old Camelbak. Usually I would just end up letting it kind of dangle there.
Date published: 2016-08-05
Rated 5 out of 5 by from Osprey nailed this one I thought hydration packs could not get any better before I bought this one. The features on this are amazing. The disconnect is half way up so you don't put your hydration pack into your pack only to remember you didn't connect the tube and have to pull it out. It also has a solid back so you can easily (forcefully?) cram it down behind your sleeping bag and other pack items. The big opening at the top is great for cleaning. The blue handle allows you to carry it to the stream to make more water. The magnetic clasp makes securing and grabbing the tube easy. And the water flows well through the 360 degree tip. I wonder how they can one up this one?
Date published: 2017-04-23
Rated 3 out of 5 by from Got the job done Purchased for my 65L Osprey backpack. As all sides are soft, and my backpack was stuffed, I always was worried there would be too much pressure on the reservoir and the water would come flying out of the tube. I have an older (7yr-ish) Osprey 3 liter reservoir and I feel like it's way more sturdy - with a rigid back, spin seal (like a Nalgene) and thicker material overall. I far prefer the older model I have and wish I could get another. That being said, no water actually ever leaked so I guess it got the job done. The flimsy appearance just makes me nervous. Oh - I also love that the tube separates from the reservoir for cleaning, but it separate pretty easily. Again, nervous about a drenched pack.
Date published: 2017-03-01
Rated 1 out of 5 by from sipping on plastic.... I purchased my hydration pack back in October 2016 and I have washed it many times and I still can't get the plastic taste out. Recently took it on a bike trip and had the whole pack open to air after soaking it for 3 days (refreshing the water twice a day: dish soap, warm water, vinegar and it was smelling fresh! I filled it up and off I went! I stopped to rest and hydrate in the middle of nowhere and my water tasted like awful plastic I had to dump it out and wait to hit a store to grab a water bottle.
Date published: 2017-03-29
Rated 3 out of 5 by from Quick Release Not Well Engineered I had last year's 3L model which I modified with a Sawyer quick release. I placed the junction approximately six inches from the bite nozzle. This worked extremely well and allowed me to easily refill the reservoir without having to open the backpack. However, the 3L was a bit big and bulky. When Osprey came out with new reservoirs this year, I picked up the 2L and sold my modded 3L. I thought, great, Osprey added a quick release, well done. On paper, it's great. In practice is another story. Osprey placed the quick release in an extremely vulnerable position. In my past five backpacking trips, I've had to remove my pack every time to reconnect the drink tube to the feeder tube. Every time, something in my pack would push against the quick release mechanism and disengage it. Nothing sucks more (pun intended) than being tired and thirsty and having to drop your pack because your reservoir isn't feeding water. On top of that, the quick release mechanism is difficult to tap into with my Sawyer refill tube and I always end up spilling water into the pack. The reservoir itself is great and I like the incorporated handle and back panel. It's much less bulky than the previous generation. The quick release mechanism, though, was badly engineered. As soon as I pick up some tubing, I'll mod it like I did for the previous gen. That'll solve my issue with it always disengaging and it'll make it much easier to refill.
Date published: 2016-09-06
Rated 5 out of 5 by from Filling is much, much easier than the Camelback! I bought this in prep for hiking the Grand Canyon. I have a Camelback I could have used but this bladder can be filled while in the pack without having to remove it and half of the items in your backpack to get it back in the pouch. It is very adaptable to various situations. I highly recommend it, as I bought this 2 liter reservoir and the 1.5 liter for my wife's pack. These products saved our lives hiking back up the Bright Angel Trail !!!!
Date published: 2016-09-13
Rated 1 out of 5 by from Failed after two uses I like the overall concept of this, but it's not trail-worthy. The seam failed just below the top closure after two five mile hike, where it was . Here in the desert, I can't take the chance of a water carrier failing on me.
Date published: 2016-07-29
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I have an older REI Tarn backpack for kids. The back measures about 14.5 inches. Do you think that is enough to fit this reservoir? Thanks!

Asked by: 94bruin
The 2 liter Hydraulics Reservoir should fit in the Tarn pack.
Answered by: REIservice
Date published: 2016-06-16

Does the Osprey 2L fit inside the Osprey Talon11 unisex backpack?

Asked by: mhall
Yes, the 2 liter Osprey Hydraulics Reservoir will fit in the Osprey Talon 11 Pack.
Answered by: REIservice
Date published: 2017-03-07

Will this fit inside the Rev 1.5 pack?

Asked by: cjrhee
​No, the Rev 1.5 can only fit a 1-1.5 liter reservoir.
Answered by: REIservice
Date published: 2016-12-26

Will this fit the older Osprey Viper 7 pack as a direct replacement for the 2.0L hydroform reservoir that is no longer available?

Asked by: JohnC
​Yes this will work in the Osprey Viper 7.
Answered by: REIservice
Date published: 2017-04-13

In the video it recommends putting lemon water and freezing in it too reduce the plastic taste. How much water to Lemon ratio and how much water? How full should it be and should it be left to freeze solid?

Asked by: Cubbycat
Hydrapak recommends squeezing the juice of 1 lemon into the reservoir and then filling with water. Fill the reservoir to 3 inches below the max line to ensure enough room for the water to expand when freezing.
Answered by: REIservice
Date published: 2017-05-11

Will this fit the Osprey Ace 50?

Asked by: Rundulgirl
The 2 liter Hydraulics Reservoir fits inside of the Ace 50 pack.
Answered by: REIservice
Date published: 2016-08-04

I'm interested in using this product with my Osprey Xenith. The previous version had a plastic handle/spine and firm backplate. I'm concerned about both the act of insertion when full and subsequent pressure. Is it rated to work under these circumstances?

Asked by: mtward
The 2 liter Hydraulics Reservoir is a great choice for the Osprey Xenith series pack.
Answered by: REIservice
Date published: 2016-07-22
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