For refills, not for the main store.
Useful precisely because it packs flat when empty, which is the situation it spends most of its life in. Good for walking a refill back from a tap.
Not a primary container. The seams are the failure point and they fail when full, which is the worst possible moment and usually inside something.
Chlorine dioxide tablets
Chlorine dioxide, not ordinary chlorine. The distinction is the point.
Gravity water filter
Filters while you do something else, which suits a base camp or a kitchen tap.
Water containers
Rigid jerrycans for the bulk, and know what they weigh.
Water filter
Check the absolute pore size, not the marketing.
Water storage barrel
For the household case, where the question is days rather than litres carried.
Last reviewed 16 September 2026. Specifications and availability change and we do not track them, so check the listing against what is described here.