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Osprey’s Hydraulics™ 2L Reservoir by Hydrapak® is ideal for large volume packs and long duration activities. The HydroStatic™ backerplate provides structure for easy loading into a full pack and maintains a flat profile. Thoughtful design makes filling, cleaning and most importantly staying hydrated on the trail easier than ever. All parts are BPA-free, phthalate-free, lead-free, guaranteed. All materials are certified food safe according to FDA and EU regulations.


  • Hydrostatic™ Backerplate - Hydrostatic™ backerplate provides structure to shove a full reservoir into a fully loaded pack and maintains a flat profile.
  • Slide-Seal™ - Easy Slide-Seal™ top opening, seals watertight and provides wide access for easy filling and cleaning
  • Pour Shield - Pour shield extends the collar to ease filling in shallower sinks and control pouring into pots or bottles
  • Carry Handle - Carry handle allows easy reservoir management and filling
  • Magnetic Bite Valve - Magnet clip attaches to the reservoir hose and pairs with the included sternum strap magnet for easy water access and hose management
  • Hydrapak® Blaster™ - Hydrapak® Blaster™ bite valve offers fast, smooth water flow with a ¼ twist on/off switch
  • QuickConnect™ System - The QuickConnect™ system allows easy removal/filling of the reservoir and filtering in the backcountry


  Volume Dimensions Weight
O/S 70 in3 / 2 l 14h x 6w x 3d in. 0.66 lbs.
O/S 70 in3 / 2 l 35h x 15w x 6.5d cm 0.3 kg
TPU film
TPU film
TPU film
Product Manual Additional languages available here �
Hydraulics™ Reservoir Product Tour




Not overly impressed with this product, after only 2 years using it only over the summer the plastic has cracked on the outlet and the water leaks out, at this price I feel it should last longer. I'm told the guarantee is only for 2 years.

New Zealand


Seems like Opsrey fixed the problems?


I just got mine and maybe Osprey fixed the top attachment hook breaking issue and the plastic taste issue. Mine does not have a hook, it's a hole in the center (see image) that you have to slide the attachment clip from the bag and fasten it. Also there is no plastic taste. I didn't even rinse mine and don't taste any plastic. This is replacement for a Camelbak crux that I did not like. The Osprey is a far superior product, pretty impressed so far.

Vancouver, BC Canada


overwhelming plasticky taste


Overpowering plasticky taste, even after rinsing and washing. Instructions are poor on filling. Clip flops around when filling/washing. Didn't leak and easy to load.

Santa Fe, NM


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.

Vancouver, BC


Quick Release Releases by Itself


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.

New York, NY


poor design


I purchaced this hydration pack for my new Osprey day pack and was looking forward to using it this weekend. Very happy I tried it out in my house before hitting the trails. I was getting my straps adjusted and tried to get a sip and nothing would come out. After taking the pack off I saw the "quick release" detached itself and after future investigation there is no lock on the quick release for the tubing and it pops apart at the slightest touch...i.e. the side of the bag touching it since it is inside. At no time would it stay together when inside the bag. I had to return it because it literally wouldn't stay together. In theory the release is helpful so you don't have to take the tubing from the pack straps when filling/cleaning but there needs to be a lock to prevent it from coming undone so easily. Also for any women with finger nails (mine are just over the tips of my fingers) you risk puncturing the bag when attempting to pull the top apart in order to fill it.

Knoxville, TN


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.

Phoenix, AZ



1.9 7


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