Crux™ Lumbar 3L Reservoir Accessories
Crux™ Lumbar 3L Reservoir is rated 2.4 out of 5 by 9.
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Give your pack a lower center of gravity with the brand new Crux LR reservoir. It delivers 20% more water per sip while keeping weight positioned low on your back, which translates to better stability in the saddle and on the trail. The Crux delivers 20% more water with every sip, plus an on/off lever that seals your tube shut when you’re not drinking. We also upgraded the fill-port design to include an ergonomic handle and a redesigned a cap that’s more intuitive and easier to fill—small changes that make it that much easier to fill up and hit the road. 100% free of BPA, BPS and BPF.
Got Your Back Guarantee


  • Offers 20% more water per sip. Lumbar design shifts water weight to your lower back for more stability on the trail.
  • 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
Product Detail


  • Capacity: 3L/100 fl oz
  • Closure: Leakproof
  • Collection: Reservoirs
  • Activity: Accessories
  • BPA/BPS/BPF Free: Yes
  • Dimensions: 27 x 28 x 8 cm / 10.5 x 11 x 3 in
  • Material: Polyurethane
  • Weight: 229 g / 8 oz
Rated 1 out of 5 by from Wider hose not a good idea I wish Camelbak would spend more time testing their product. It seems no thought was invested in studying how expanding the diameter of the hose would increase the amount of hot water in warm climates like Arizona. I just bought this Reservoir thinking the value connection improvement would be good. I didn't realize they expanded the hose diameter. Bad Idea. All it took was a single ride to realize how quickly the water heated up from the sun. BTW- hose insultation doesn't work either on their 'cold weather' gear. Camelbak, please invest in features that matter. Hot water in Desert climates is a problem. There's solves for this's time to come up products that support it.
Date published: 2018-05-20
Rated 1 out of 5 by from Camelback crux lumbar 3 L reservoir I bought this a couple months ago with a very nice pack. This is the worst reservoir camelback has ever made. I love the backpack, but this reservoir has leaked since the day I bought it. If the water gets anywhere near the fill opening, I have water all over my back, so I can't fill with more than about 1 liter of water. Also, the water moves to the side opposite the tube and valve so I am sucking air even if the reservoir has water in it. I paid $150 for this pack and have been using camelback products for 30 years. This one is a real loser
Date published: 2017-06-25
Rated 5 out of 5 by from Works Great for Me This Lumbar 3L Reservoir came in the CamelBak Sundowner that I bought a year and a half ago in preparation for a one-day Grand Canyon South to North Rim to Rim hike. Since then I've also used it this spring for a one-day Grand Canyon Rim to River to Rim hike. I like how the reservoir fits low on my back in the Sundowner, and the water stays relatively cold. I've never had a problem closing the lid tightly. For me, it's been a great reservoir, keeping me well-hydrated during training and Grand Canyon hikes. I especially like how easy it is to drink from the tube.
Date published: 2018-06-23
Rated 5 out of 5 by from Great Product I purchased this water reservoir for my Badlands backpack because the Badlands 3L reservoir was not available on their website. This is the first water reservoir I have ever used, but thought I should definitely get one since I was going to be in the field every day for over a week. The only time I ever had any leaks with this reservoir were when I was not careful to install the fill cover properly. I noticed the leak immediately when up-righting the reservoir, loosened then re-threaded the fill cover, and no more leaking. The reservoir performed perfectly, and the volume of water per sip was excellent. The only negative criticism I have is the soft hose could be easily cut or torn while walking through heavy brush, but I see an insulated tube is offered, so I expect that would solve that problem, and would also keep the water from freezing in colder weather.
Date published: 2018-02-02
Rated 2 out of 5 by from Definitely not leak proof The cap does not seal very well. I just bought the camelback lr 15 on Amazon and very disappointed. I have to open and close the cap multiple times to stop the leaking. It will eventually seal but very aggravating to have to play with it before it will seal.
Date published: 2019-07-07
Rated 1 out of 5 by from Leaks, more like dumps Thought I got lucky... this came in my mule ($130) and worked well for six months. Now? Completely worthless, and I’ve tried a lot of different things to get the reservoir to seal again. My buddy bought the same pack and has the same problem. It’d be nice if camelback got their act together, what a load of garbage. Go buy an osprey.
Date published: 2019-07-16
Rated 1 out of 5 by from Leaks leaks leaks Leaks. Lousy design. Camelbak could do us all a solid by redesigning this product and shipping us a replacement THAT SEALS.
Date published: 2018-04-22
Rated 5 out of 5 by from Perfect for getting around I bought a pack with the reservoir. It has never given me a problem over the 6 months I've had it. Really like where the water weight sits as opposed to along the back. Never leaked yet.
Date published: 2018-05-15
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