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Watercell ST (4L to 10L)

Watercell ST (4L to 10L)

A minimalist water storage solution for lightweight excursions+ View tech specs
  • Size
  • ColorBlack

BEST USE: Ultralight Backpacking

MATERIAL(S): Abrasion resistant semi-translucent TPU

DIMENSIONS: 11 x 8.5 x 4 inches

WEIGHT: 4.4 oz | 125 g

Shipping & Returns

Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.

2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).

All orders are eligible for fast and easy returns within 60 days of purchase.

For more details, please check out our Help Center

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Wartercell ST _ 4L 6L 10L reservoir water bag
Watercell ST (4L to 10L)
Description || Watercell ST (4L to 10L)


The Watercell ST is your streamlined water storage solution for lightweight adventures. Minimalist, strong and pliable, its compact 3D shape and internal baffle design makes it manageable and easy to fill, stow, stack and drain.

It's constructed with RF-welded seams for ultimate strength and reliability, as well as food-grade TPU which is also BPA and PVC-free. Strategically positioned water-resistant grab-handles offer carry and lashing options, while the screw-top standard wide-mouth opening and low-profile fill handle make filling effortless.

Fill lines printed on the rear of the Watercell show the approximate volume. The 63mm thread of the fill-opening is compatible with many water filters / purification systems, and with standard hard-plastic drinking bottle caps.



Tech specs

  • Best Use
    Camping, Overlanding, Backpacking
  • Material(s)
    Abrasion resistant semi-translucent TPU

Frequently Asked questions

Can it be used with the Watercell X shower attachment?

No, if you want to use that shower attachment, you will need to purchase the coordinating Watercell X.

Can it be cleaned with bleach?

We don't recommend using bleach in the Watercell. Instead, try taste-free peroxide cleaning tablets that are just as effective and don't leave an aftertaste.

Can it hold liquids other than water?

Yes, you can use other liquids in the Watercell, but only if it's cleaned correctly and thoroughly afterwards. We recommend using peroxide cleaning tablets for an effective clean without the aftertaste. 

Will it leave a residual taste in the drinking water?

The TPU film is made to leave the least amount of residual taste. However, no soft-sided water container (regardless of brand) is completely taste-neutral, except the Mylar bladder of the Pack Tap.

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