Every survival kit, and every trip into the backcountry, requires water. While we can live without food, we cannot live without water. And so we review here our favorite water purification system, the ultra lightweight Steripen Adventurer Opti, which uses UV light to purify drinking water.

Using the Steripen

Its ease of use is one of the biggest reasons we love the Steripen. It’s as easy as this:

  • Fill your bottle with water – a cloth or pre-filter can be used to keep out debris if you like
  • Turn the Steripen on and select your bottle size (press button once for 1/2 litre, twice for 1 litre)
  • When it lights up, put the pen into the water bottle and stir until the light turns off (1-2 minutes for a 1 litre bottle)
  • And you’re done – 99.9% of harmful bacteria and viruses have been eliminated

Steripen Adventurer Specs

Capacity: The Adventurer will purify up to 8,000 litres of water

Time: Sterilizes 99.9% of harmful bacteria, and viruses after 45 seconds

Weight: 3.8oz with batteries

Dimensions: 6.1 x 1.3 x 0.9 inches

Powered by: Two CR123 batteries

Included: Batteries, neoprene case with belt loop, 3-year warranty

Price: $99