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Product guide

CamelBak Mil-Spec Crux Long Reservoir, 1944001003

The CamelBak Mil-Spec Crux Long Reservoir (1944001003) is a replacement-style hydration reservoir with a claimed high-flow design, a wide refill opening and a shutoff lever. Its listed weight and TPU construction may suit buyers who need a reservoir for an outdoor or tactical setup, while reported mixed experiences with leakage merit attention.

At a glance

  • The Crux design is claimed to deliver increased water flow per sip.
  • A wide-mouth opening and quarter-turn cap are described for refilling.
  • An integrated shutoff lever is intended for one-handed flow control, including while wearing gloves.
  • An internal baffle is claimed to reduce sloshing by spreading water more evenly.
  • An ergonomic fill handle and wide opening are described as aids to filling and cleaning.
Price
$45.71Save 26%

Reference price: $61.75

Price checked: Nov 14, 2026

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Often bought together

Pros and cons

Pros

  • The listed 100-fluid-ounce capacity and 3-liter tank volume suit buyers seeking a larger reservoir.
  • The wide opening and fill handle are designed to simplify filling and maintenance.
  • A shutoff lever provides an accessible way to turn water flow on or off.

Technical specifications

12 specifications
Identity
BrandCamelBak
Model1944001003
Dimensions and installation
Weight listed5.1 ounces
Dimensions9.45"W x 17.72"H
Strap typeShoulder Strap
Pocket descriptionUtility Pocket
Capacity and use
Capacity100 fluid ounces
Tank volume3 liters
SportsOutdoors, Tactical
Materials and features
Material listedThermoplastic Polyurethane (TPU)
ColorBrown
Additional featureInsulated

What to know before buying

  • The listing gives capacity as both 100 fluid ounces and 3 liters. These are not identical quantities, so confirm which figure applies to the selected reservoir. Customer feedback also includes mixed reports about leakage, making secure closure and handling worth checking during use.

What’s in the box

Included
  • Hydration reservoir

Who is it for?

A good fit for

  • Outdoor and tactical users seeking a long-form reservoir with a listed capacity around three liters.
  • Buyers who value a wide refill opening, fill handle and one-handed shutoff control.

Less suited to

  • Buyers seeking a complete hydration backpack, since the listed included component is the reservoir.
  • Anyone who needs leakage performance to be assured by the listing alone, given mixed customer feedback.

Customer reviews on Amazon

4.7 / 5 · 455 ratings
  • 5 stars83%83%
  • 4 stars9%9%
  • 3 stars6%6%
  • 2 stars1%1%
  • 1 star1%1%

Customer feedback highlights perceived quality, durability and function, while leakage experiences are mixed and include reports of leaks. For buyers considering the listed 100-fluid-ounce, 3-liter reservoir, the positive impressions are encouraging but do not settle how reliably a particular unit seals. The aggregate ratings lean positive, but ratings alone do not explain individual experiences.

Positive themes

  • Customers are described as finding the reservoir well made and durable.
  • Some feedback describes it as working well.

Mixed feedback

  • Leakage feedback is mixed, with customers reporting issues with leaks.

Frequently asked questions

What capacity does the listing give?

It lists 100 fluid ounces and also gives a tank volume of 3 liters. Because those figures differ slightly, confirm the capacity for the selected listing.

Does this include a backpack?

The supplied included-components information names a hydration reservoir. It does not list a backpack.

What features are intended to help with filling and flow?

The listing describes a wide-mouth opening, quarter-turn cap, ergonomic fill handle and an integrated shutoff lever.

Do customers report leakage concerns?

Yes. Customer feedback describes leakage experiences as mixed, including reports of leaks. This is customer feedback and does not establish that every unit leaks.

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