Spending lots of time outdoor? The outdoor line keeps you hydrated when on the go. Outdoor SteriPENs treat up to one liter of water, last for 8,000 treatments, and are powered by internal rechargeable, CR123 batteries, or AA batteries.

SteriPEN Ultra

SteriPEN Ultra
Rechargeable & OLED display!
50 treatments per charge.

SteriPEN Adventurer Opti

SteriPEN Adventurer Opti
Lightweight & high tech.
Backpacker Magazine
Editor’s Choice!

SteriPEN Classic

SteriPEN Classic 3 with Pre-Filter
The next generation of
the original handheld purifier!
Uses alkaline or lithium batteries.

Purifying water for hiking, camping, and outdoor adventures since 2001!
Thousands of outdoor enthusiasts all over the world have trusted SteriPEN for many years. SteriPEN’s patented UV water purification technology was first introduced to hikers and campers at REI in 1999.


Not sure which SteriPEN model is right for you? Compare SteriPEN Models

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Testimonials View All Testimonials

John Mathe
 It gives me drinkable water in under two minutes, I can use it on the move, and it fits anywhere!
John Mathe Author - In the Footsteps of Greatness
Don Fletcher
In a survival situation clean drinking water is one of the main priorities, and the Adventurer Opti is great to ensure that what you are drinking is safe.
Don Fletcher Bear Grylls Survival Academy
No chemicals. Charge the battery before using and it's good to go!
Donna Blogger - Chasing Clean Air


SteriPEN Awards View All Awards

 Time Magazine Award 

Outside Magazine 


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