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The Top Picks Of The Season

SteriPENSteriPEN Adventurer Opti

SteriPENSteriPEN Adventurer Opti

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4.5 out of 5 stars
45 Reviews

Pen mightier than bacteria.

Destroy harmful waterborne bacteria in your water with the Hydro-Photon SteriPEN Adventurer Opti. The SteriPEN uses UV light to kill giardia, cryptosporidium, bacteria, and viruses in just a few seconds, so you can stay hydrated on the trail without having to worry about getting sick. And at a scant 3.6 ounces and 6 inches long, the Adventurer Opti won't weigh you down or use up a ton of valuable pack space.


  • Lightweight SteriPen purifies water on backpacking trips
  • Stir UV light in 1 or 1/2 liter of water for 90 seconds
  • Destroys 99.9% of viruses, bacteria, and protozoa
  • Runs on two included CR123 batteries
  • Replaceable lamp works for 8,000 treatments
  • Item #HYD0017

Tech Specs

Purifying Element
UV light
Lamp Life
8,000 treatments
Claimed Weight
with batteries 3.6 oz
Recommended Use
hiking, camping
Manufacturer Warranty
limited lifetime

Overall Rating

4.5 based on 45 ratings

Review Summary

5 Stars - 33 reviews
4 Stars - 11 reviews
3 Stars - 1 reviews
2 Stars - 0 reviews
1 Stars - 0 reviews

Fits Small

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Runs smallTrue to sizeRuns large

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