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Ultimate Source M.C.
3L Hydration Bladder


The FILBE compatible Ultimate Source WXP Low Profile Hydration System with XL filling handle is usable with most common hydration systems of competitors. The revolutionary UTA Rapid Refill Adapter lets you refill your Hydration System through the drinking tube without removing the bladder from your backpack or vest.

In stock


Care Free Tm


Cleaning and maintenance is not an issue: Water stays fresh and tasty for days and weeks - just fill, drink, refill.

Grunge Guard Tm

Grunge Guard™

An antibacterial agent permanently embedded in the reservoir’s Glass-Like film keeps your water fresh and clean. It has no effect on the contents, is non-leaching and effective for the life of the system.

Glass Like


The inside of SOURCE bladders is super smooth, 2000% smoother than competitors, and almost as smooth as glass. This helps prevent bio-film buildup in the reservoir.

Taste Free


All SOURCE bladders are 100% BPA and Phthalate free and retain the pure taste of liquids without any plastic flavor. Your water stays fresh, odor- and taste-free for days, even weeks.

Widepack Tm

Widepac Closure

The original user-friendly and air-tight Widepac Slide Closure opens wide, allows easy filling, ice-insertion, cleaning and drying. Appreciated by millions of SOURCE customers for almost 30 years.




Reservoir Capacity

3 Liter

Bladder Design

Low Profile Bladder
Screw Cap
Widepac Opening

Drinking Valve

Storm Push-Pull Valve

Drinking Tube Length

94 cm / 37 in

Hydration Extras

Dirt Shield
Tube Cover

Weight (kg)


Dimensions (cm)

36 × 25 × 8 cm


Our low-profile Ultimate Source M.C. Hydration System is designed to fit US Marine Corps FILBE gear. This low profile blatter features all the Source Hydration advantages. The UTA Rapid Refill Adaptor lets you refill your hydration system on the move.

Ultimate M.C. Bladder Features

  • Angled SOURCE Storm drinking valve turns 360 degrees for perfect valve/mouth orientation; allows the tube to be 25cm shorter resulting in less excess tube bouncing around the chest, less snag hazard.
  • High-flow drinking valve is a SOURCE Storm push-pull valve that gives you full flow with no effort. Valve is exchangeable with our Helix bite valve (sold separately).
  • Low Profile: Maximum utilization of low profile technology reduces the depth of the carrier.
  • Large NC Filler Cap: air tight, low profile one hand operated; compatible with commonly used personal filtration systems; cap fits FILBE hydration filler opening
  • Dirt shield valve cover protects mouthpiece from dirt.
  • Cool Weave Cover Tube: Insulates and blocks UV-light; water stays cool and inhibits bacteria growth.
  • Large NC Filler Cap: air tight, low profile one hand operated; compatible with commonly used personal filtration systems; cap fits FILBE hydration filler opening.
  • The Magnetic Clip holds the drinking tube and valve of any hydration system in place when on the move; easily attaches to shirt, shoulder strap or MOLLE webbing.

UTA Features

  • The reservoir is filled directly through the tube eliminating the need to open or even remove the hydration pack from your back for refills.
  • Connects easily to hydration bladder tube via Quick Connector
  • Fits most bottles and taps
  • Filling time from a 1.5L bottle: ca 50 seconds; filling time from tap: 2L in 45 sec, 3L in 1 min 05 sec
  • UTA expands when reservoir is full and automatically disconnects if reservoir is accidentally overfilled

SOURCE Hydration Technology & Materials

  • Taste-Free System: Co-extruded PE film retains pure liquid taste without plastic flavor; BPA and phthalate-free.
  • Glass-Like Film with Grunge-Guard Technology: Inhibits bacteria growth on reservoir and drinking tube surface.
  • Care-Free: Cleaning by simply rinsing the system and hanging it opened until dry (if used with water).
  • Widepac Closure: Patented slide closure for easy draining and cleaning; airtight seal.

Choose Capacity

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