2L Collapsible Water Bag, 28mm Sawyer-Compatible Review
A larger dirty-water reservoir changes how a Sawyer setup works at camp, because the constraint stops being the filter and starts being how often you walk to the water.
The verdictThe cheapest way to make a Sawyer setup work for a dry camp. Thin material is the trade, so treat it as a consumable and pack it carefully.
The standard Sawyer pouch holds well under a litre, which is fine for topping up on the move and poor for arriving at a dry camp needing four. A 2-litre bag on the same 28mm thread halves the number of trips to the water and lets you hang it and gravity-feed while you set up, which is the point at which filtering stops feeling like a chore.
The listing gives 79 g and 0.3 mm TPU with welded seams, and it rolls flat when empty. It fills through a wide slider opening at the top and feeds the filter through a 28 mm cap, so it also works as a plain water carry for a dry camp. The listing claims fit with the Sawyer Squeeze, Micro and Mini.
The low-star owner reports are specific. One describes the slider coming off while the bag hung full and losing two litres, and another a pinhole leak after one trip. Owners on Amazon US gave it 4.3 stars from 109 ratings in October, so treat it as a consumable and carry the original pouch as a backup.
Hanging it is what makes the size worth carrying. A full two-litre bag hung from a branch or a bike gravity-feeds through the filter while you pitch a tent, which turns filtering into something that happens on its own. Check that the slider is fully closed before hanging it, because that is where the reported failure happened.
What works
- 2 litres cuts trips to the water source
- Standard 28mm thread fits the whole Sawyer range
- 79 g and rolls flat empty
- Can be hung for gravity feeding at camp
What doesn't
- Slider top can come off when hung full
- Only 109 owner ratings so far
- Overkill if you only top up bottles on the move
Buy it if
Riders making dry camps who filter several litres at once
Skip it if
You only ever top up a single bottle on the move
Others we scored in this category
Sawyer Micro Squeeze Water Filtration System (SP2129)
Sawyer Squeeze Water Filtration System (SP129)
Katadyn BeFree 1L Collapsible Water Filter Bottle
Platypus QuickDraw Microfilter System (1L)
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