Cupster
Camping Water Filter
RARITYARare

Camping Water Filter

The home filter stays on the counter; this one weighs almost nothing and goes in every pack. It makes stream, lake, or tap water safe to drink, and one filter lasts a lifetime.

  • Water
  • Drinking
  • Off-grid
Value Ratio
9.0/10
Versatility
8.0/10
Impact
8.0/10
Durability
8.0/10
Difficulty
2.0/10
Reddit
Recommended Form0.1 µm hollow-fibre, multipack
Best UsedOne per pack, car, and go-bag
ImportanceHigh
DifficultyBeginner
Removes
BacteriaProtozoa (Giardia, Cryptosporidium)MicroplasticsSediment
Won't removeVirusesChemicalsSalt
Strengths
Palm-sized, featherlight
Filters for a lifetime
Drink straight from the source
Pore0.1 µm
Weight~57 g
Capacity~380,000 L
Synergies
  • Water Purification TabletsWater
  • Gravity Water FilterWater
Watch For
  • It doesn't remove viruses; for a city flood or abroad, follow it with a tablet.

  • Never let it freeze wet; the fibres crack, there's no way to tell, and it's then useless.

  • Backflush when the flow slows; a clogged filter is a slow one, not a broken one.

  • It filters the dirt, not the poison; chemicals, pesticides, and salt pass straight through.

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