Latest Reviews


rated 4.5 of 5 stars I got this three summers ago after going on a backpacking trip with a buddy who had one. I really like the convenience and the quickness on how it works. Here in CO most of the mountain streams we come across run clear so we are not dealing with murky, dirty water. The included filter works well to block the bigger stuff. I've put three years of use on the Classic model and to date, have had zero issues with it. I buy the lithium ion batteries for it and the last set made it through the complete… Full review


rated 3.5 of 5 stars Works well but is better suited for base camp or cabin use rather than backpacking. This is my third Steripen, I also use an Adventurer and a Classic. I originally bought this because it did not require any batteries  which would be one less thing to worry about. As far as basic operation goes they all work the same. I got this Sidewinder about 6 months ago and in that time I have had no issues or problems with it at all. It works just as the manufacturer says and since I have not acquired any… Full review


rated 4 of 5 stars This water purifying source is very easy to use. It is very small and lightweight for backpacking trips. I recommend a backup treatment option of some kind in case you run into battery or workmanship issues. At right around $50 it is very affordable. My friend had a SteriPen Classic and the quick, easy treatment of the water with the UV light was very impressive. I found this smaller, lighter model and purchased it instead.  It provided about 400 treatments before I had issues with it (the light… Full review


rated 5 of 5 stars The easiest way to be safe when using unknown water is the SteriPEN! Some friends and myself took a backpacking trip into Denali National Park. Specifically we hiked up the Toklat River crossed the ridge to the west and then returned through what was essentially a swamp. We knew water was going to be a factor on the trip. We had planned on 3 days in and 3 days out with 1 extra day for what ever... So, 7-day trip in the backcountry. The main source of water for the first half was the river. A glacier… Full review


rated 3.5 of 5 stars The SteriPen line offers a great new tech for h2o off piste. After significant time spent researching the line of products I decided on the Ultra for two reasons. One; it is rechargeable (no peculiar batteries to find) and Two; it doesn't have the battery draining "flashlight" like the Freedom. On a light and fast tour around Summit County Colorado this Memorial Day weekend I had good opportunity to goof around with the Ultra. With the low volume and minimal weight this was added to my fastpack… Full review

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SteriPEN Coverage in the Trailspace Blog

SteriPen's Ultra UV Water Purifier is All Smiles
SteriPen has expanded its 2013 lineup with the Ultra, which it calls "the most advanced UV water purifer in the world." Read more
February 6, 2013

SteriPEN Freedom: smaller, lighter, rechargeable UV purifier
SteriPen introduced its smallest, lightest, and first rechargeable water purifier: the Freedom. Read more
August 6, 2011

Outdoor Retailer: Hardgood Gear Highlights
Outdoor Retailer abounds with enough models, styles, and price points of outdoor gear to equip every flavor of outdoors guy or gal. Here are a few more highlights from January's show. Read more
February 3, 2011

Outdoor Retailer: SteriPEN Sidewinder -- hand-crank UV purifier
SteriPEN has introduced the battery-free, hand-crank Sidewinder UV water purifier for fall. The Sidewinder uses an exclusive UV system that destroys waterborne bacteria, viruses, and protozoa, such as giardia and cryptosporidium. Read more
August 6, 2010

Outdoor Retailer: SteriPen Adventurer Opti
Pam Aubuchon-Fields, marketing manager at SteriPen, gave us an explanation and demonstration of a prototype of the SteriPen Adventurer Opti handheld water purifier at Outdoor Retailer. Read more
July 22, 2009

Outdoor Retailer: SteriPen FitsAll Filter
SteriPen, makers of ultraviolet water purifiers, introduced the FitsAll Filter, a 4-micron filter for use before purifying water with a SteriPen. Read more
January 23, 2009


SteriPEN by Hydro-Photon
262 Ellsworth Road
P.O. Box 675
Blue Hill, ME 04614

phone: (888) 826-6234
toll-free: (888) 826-6234