• Volume 3 litres
  • Weight 310 grams
  • Cost $89.99

Osprey Hydraulics 3L Reservoir



Rating: 8.6 / 10
Value for Money 2.3 / 2.5
Usability 2.2 / 2.5
Weight 2.1 / 2.5
Durability 2.0 / 2.5

Osprey Hydraulics 3L Reservoir Review

There are two main types of hikers in this world as far as drinking water on the trail; bladder drinkers and bottle drinkers. Talk to either type and they will usually try to convert you to their point of view. Both Gill and I are bladder drinkers and in my case I just find that I will drink more water when I use a bladder as it’s just so easy to access. When you have to either take your pack off or reach around to the side pockets to access your water bottle, out of habit you will just drink less. No a problem on short hikes or on those days where its cool but on long and/or hot days this can greatly impact your ability to keep on hiking. On my biggest every summer day (58km/15 hours) I drank eight litres of water and the bladder just made this so easy.

There are a number of bladder brands on the market but I have found that I like using the Osprey water bladders particularly because of the magnetic clip that attaches the nozzle to chest clip. This means that the nozzle is always easy to find in addition (in this latest version) to having an easy to unclip detachment point half way along the tube which makes it very easy to remove the bladder out of the pack.

This current version of this bladder also has a new fill point at the top that replace the large screw cap that was previously located on the front of the bladder and that created problems with leakage for so many hikers, particular if you had smaller hands and struggled to get is done up correctly.

This bladder comes in a range of size ranging from 1.5-3 litres but I prefer to use the 3 litre version for longer hikes and fill up only as much as I need. The additional weight in carrying a bladder that you haven’t filled is not that much extra.

Like any product there are negatives on this bladder with the main one being that the attachment point to hold it at just the correct height in the pack  is a weak point that can fail so I end up using a small piece of ribbon which works well if thats the case. The other downside is the magnetic drinking tube clip that I love so much will attract grit if you are hiking in environment with soils that are high in iron content. A minor inconvenience but you will need to wipe down the magnetic clip every so often to remove the grit. To limit this don’t drop the drinking tube into the dirt. The next downside is that ideally you only want to use drinking bladders when you have a dedicated bladder pocket on your pack  (either internal or external) otherwise you run the risk of accidentally puncturing the bladder if you are rough with your gear (Rare occurrence) or you may need to unpack your pack to refill the bladder. The final downsize is that when using water bladders you will need to replace the soft rubber bite valve on the bladder every so often. I found on my Bibbulmun track hike the bite valve lasted the five weeks, but only just. If using this for day hikes this may only need to be once or twice a year. To be on the safe side carry a spare on long hikes, just in case.

While there are cheaper water bladders on the market I just love this model and will be hard pressed to replace it with something else.

We Like

  • Love the magnetic chest strap clip. The nozzle is always easy to find
  • Having the bladder drinking tube easy to find means that I will drink more, particularly on hot days
  • Perfect size for me lasting all but the hottest and longest days. This is one of the biggest water bladders on the market.
  • Easy to fill. This current version fill system replaced a cumbersome fill point on the old model
  • You don’t have to fill this bladder all the way up if doing a shorter walks

We Don't Like

  • The pack attachment point that holds the bladder in the correct position is a weak point
  • The magnetic clip will pick up dirt if the environment is high in iron
  • Bladders in general are best used in packs that have dedicated hydration pockets
  • The bite valve on this or any other bladder will need to be replaced occasionally

Best Uses

  • For big drinkers, or on those long hot days

Osprey 3litre Bladder

Rear of Osprey 3litre Bladder. the 3 litres size has additional protection that the smaller version lack

Water fill point at the top of the bladder

Drinking tube detachment point

Magnetic hold point and bite valve. The other part of tis magnet lives on the cost clip. Twist the bite valve and the water is locked of or tuned on

Buy One

You can purchase the Osprey Hydraulics 3L Reservoir online from Wild Earth

Disclosure:  We may earn a small commission, at no additional expense to you, if you click through and make a purchase. Please note that our affiliations do not influence, in any way, the independence of our reviews. If we don’t like a product, you’ll hear about it from us!



AUD $89.99 RRP

Other Versions


This review was done with product purchased from a retail store by Australian Hiker

Last updated

14 January 2024

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