Crux™ 3L Reservoir

Accessories The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling of the bladder, and an on/off lever that makes it easy to prevent leaks.
Crux™ 3L Reservoir is rated 2.2 out of 5 by 31.
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If there’s one thing we know best, it’s water. Our athletes, customers and colleagues told us they wanted a reservoir that delivered more water per sip, with a foolproof design that made it easy to fill up and hit the trail. The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks. Like all of our gear, we put the Crux through exhaustive stress tests to make sure that it won’t fail you on the trail. 100% free of BPA, BPS and BPF.


  • Offers 20% more water per sip
  • Leak-proof cap is easier to open and close
  • On/off lever lets you seal your drinking tube shut with one hand
  • Hydroguard™ technology inhibits the growth of bacteria in the reservoir and tube
  • Big bite valve self-seals after each drink, eliminating annoying drips


  • Capacity: 3L/100 fl oz
  • Closure: Leakproof
  • Collection: Reservoirs
  • Activity: Accessories
  • BPA/BPS/BPF Free: Yes
  • Dimensions: 46 x 23 x 8 cm / 18 x 9 x 3 in
  • Material: Polyurethane
  • Weight: 235 g / 8 oz
Rated 1 out of 5 by from Absolutely worthless Every single time I have used this since the day I got it it has either leaked or taken several times to line the threads to get a proper seal. The thread cap on this is absolutely horrendous and will add five to ten minutes to your out the door time every time you go out (this is valuable time when you have two leashed labradors ready to go). I learned the hard way the first few times with a soaked lower back- either up in the snow or out of drinking water in the desert.
Date published: 2018-06-21
Rated 1 out of 5 by from Cap leaks Bought for my wife for her birthday. The cap is totally hopeless. It leaks really bad. Pretty much pours out. The gasket is fine, nothing in the way if tightening it down. Now I have to battle with the LBC shop to return it. This is the last camelbak product I will buy. .....junk
Date published: 2019-07-08
Rated 1 out of 5 by from New Cap Prone To Leaking The persons responsible for engineering these new crux reservoirs should be fired and banished from working in industrial design forever. The cap is a pain to screw on without cross threading, which leads to leaks.
Date published: 2019-06-09
Rated 1 out of 5 by from New reservoirs I have been a consumer of Camelbak products since I sold them at Pomeroy Sports in Aspen. Everything Camelbak first made was excellent. Now I can’t find replacement reservoirs to fit any of my several, different sized packs. And the lids to the new reservoirs, I have a meltdown every time I try to fill one. The lids are impossible to screw on ever since you came up with the 1/4-turn-to-close feature. I spill endless amounts of precious water trying to get it right, and the time spent attempting to close it is ridiculous. I should be on my way to my adventure instead of having a temper tantrum at the kitchen sink. Camelbak was a no-brainer in its day; there was no need to even think about looking at other brands. Sometimes change is not good. Please rethink your products. And just bring back the old, straight reservoirs with lids that screw on the way a lid should. Thank you. And by the way, I work in a high-end shop that sells another brand of hydration packs, but I always send my hardcore hikers and bikers over to the Ute for a Camelbak!
Date published: 2019-09-14
Rated 1 out of 5 by from Leaks Bought this a week ago to use on a trail ride, water leaked out of the fill cap.
Date published: 2019-03-25
Rated 1 out of 5 by from Horrible Design 00 Stars should be option here Leaks like a seive
Date published: 2018-07-08
Rated 1 out of 5 by from Dissapointment of the year! I have up until recently used a cheap Source water system, as this was the only one available in the store when I needed one. It worked ok, but has some obvious flaws, such as a not very good mouth piece and problems at winter. When the time had come to buy a new one I was very exited to try the Crux, as most people i talked to recommended Camelbak in general for water systems. Everything looked super nice, - until i started actually using it. My first trip in the woods i had 2 (two!) accidents with the Crux leaking from the cap! I soon realized that you need to be VERY careful to check that the cap hits the locking mechanism 100% correct, or it will leak A LOT! I didn't stand a chance to see that it wasn't put correct on, until I looked very close at it. This never even once happen to my old cheap water system, I have used that for more than 300 trips!! Do I really want a water system where I don't know if there is a flood in my backpack at any given time? Also the tiny plastic thing at the top with two "arms" to secure it is useless! Why not make a ring or something that is easy to attach to? All in all, with two major leaks the first trip, and another one a couple of days later, I will return this to the store and get my money back. I hope the people at Camelbak understand that this is frustration, and a hope that they will make some better way to secure the cap and avoids spills, and also do something about the securing thing at the top.
Date published: 2017-08-30
Rated 1 out of 5 by from Seal broke in no time... I thought they had fixed the problem, but in barely a week of use, the plastic ring (seal) came loose. Very disappointed...
Date published: 2019-07-09
Rated 3 out of 5 by from It's great Yeah it's great until you drop it, when that happens it's going to start pouring out of the bag. Mine doesn't just leak a little bit, it pours out of my bag with the lid on about as fast as I can pour a bottle of water in.
Date published: 2019-07-10
Rated 2 out of 5 by from inadequate for cycling I used this type of system today for the first time. It came as part of a backpack I ordered. I noticed I have to suck really hard on the tube (yes, I did squeeze the mouthpiece open), thus wasting extra body energy. The last 0,2 l or so would not come out at all, unless I put one hand on my back to squeeze the reservoir. Hygiene is also a problem, with no mechanism to dry it properly after cleaning (trapped water is likely to generate germs in no time). I decided not to use it for cycling again, will revert back to the 0,5 l bottles from the discounter, they give me a welcome excuse to stop at regular intervals to drink. I might consider using this thing for glider flying, where small amounts of redundant weight (=unusable liquid) are irrelevant. The instructions for use that come with it, are not worth mentioning. I did visit "for additional cleaning instructions" as you can see, but couldn't find any. Anyway, I bought the backpack for the sake of the backpack and regarded the water reservoir as a goodie. A mostly useless goodie though.
Date published: 2017-10-03
Rated 1 out of 5 by from Leaks like crazy. Camelbak please stop selling. Such a piece of junk. Bought the snow version to keep in my snowboard pack while riding long days. Well, it leaked all over my extra layers and down my back (didn’t notice w my shell until I took it off) and FROZE. Tight! Returning to REI on Monday. Camelbak, you should NOT be selling this product. It’s junk. You’re better than this.
Date published: 2020-01-26
Rated 1 out of 5 by from Junk. Bought the Rogue with Crux bladder. LEAKS. Nothing worse that getting to trail head with an empty pack OR, you fo everything you can to keep from leaking in the car to have it leak on your back when it's 39 degrees outside and have no water 10 min into a 2 hour ride. True P. O. S.
Date published: 2020-02-15
Rated 5 out of 5 by from No Spills! I've been using Camelbak reservoirs for years in the military and had a number of spills and leaks over that time. Since this new model came out a few years ago, I've yet to have a single leak despite the abuse I put it through! I also work for an organization that puts veterans on long distance hikes. Each year about 16 veterans (6 PCT, 4 CDT, 2 AZT, and 4 cyclists) use them for their 3-6 month long adventure and we've yet to have bad feedback!
Date published: 2020-03-31
Rated 3 out of 5 by from tested on a 3 day hike Installing the cover for the mouthpiece was a difficult task because of so much friction. I lubed the silicon piece with spit and got it back on. When filled with water I found that the reservoir was really thick and the carry handle and the big cap were getting squeezed a lot in my backpack. I didn't measure my "water per sip" metric but it was a mouthful. The valve had no practical use for me. I had it in allways on position.
Date published: 2018-07-25
Rated 1 out of 5 by from Worked until it didn't I have had this for several years but it is leaking at the O ring-- badly.
Date published: 2020-03-29
Rated 5 out of 5 by from Does exactly what the description says1 Perfect reservoir, exceeds expectation. Would never go back to my old bladder.
Date published: 2017-02-15
Rated 5 out of 5 by from Solid, reliable water reservoir I get this 3L Crux reservoir to replace an older 2.5L bladder. And this 3L Crux works just fine. Others have mentioned of leaks. This reservoir doesn't leak. Have used this on 2 separate day hikes and it does everything that it should.
Date published: 2019-09-27
Rated 5 out of 5 by from Impressed with updated design Purchased this to replace my old reservoir - this style has been out for a while, but I finally broke down and purchased it to replace my original reservoir. I love the quick disconnect of the hose for cleaning and swapping between normal tube and insulated tube. I've seen comments regarding this version leaking from time to time around the lid. I have not used it yet so that is to be determined for me. So far I'm impressed and look forward to using it.
Date published: 2020-03-03
Rated 5 out of 5 by from Excellent 3 liter water bladder Just bought this for a hiking trip and it was perfect! So easy to use and 100% reliable!
Date published: 2017-04-24
Rated 1 out of 5 by from Terrible - leaks at the seal Never thought I'd be writing a review like this about a premier brand. This bladder leaks horribly, you have to try to keep it upright to avoid soaking your backside and legs...oh and if you forget, bending over will soon remind you! Camelbak what are you doing about it?? Looks like im not the only one suffering!
Date published: 2020-07-05
Rated 1 out of 5 by from The taste, the taste!! I never understood what people were complaining about with the taste. I used it for many months without a taste problem and then it hit and nothing I do will get rid of it and nothing I add to the water will cover the terrible taste. I've been a fan od Camelbak for at least 20+ years. I think I know why REI stopped carrying their packs and reservoirs.
Date published: 2020-05-17
Rated 5 out of 5 by from Better This is better than the stock one that came with my pack.
Date published: 2017-07-28
Rated 1 out of 5 by from JUNK! LEAKS Leaks no matter how tight. GARBAGE. I paid way too much for this backpack that soaked all of my gear!!!!
Date published: 2020-05-02
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