Adventurer Opti


5.00 out of 5

Lightweight water treatment for peak performance in the outdoors! Adventurer Opti was built for the toughest mountains and rivers in the world. Backpacker Magazine gave it their Editor’s Choice Award in 2011 for changing the face of portable water treatment. Recipient of a 2012 Desnival Award … one of the 15 best new products. When camping, backpacking & hiking, if you won't have access to the power grid for several days a time, Adventurer Opti is the product for you.

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The Adventurer Opti is essential gear for thousands of adventurers. Adventurer Opti features a patent-pending technology – an optical eye senses water to ensure safe use and effective treatments. The revolutionary optical water sensor doubles as an integrated LED flashlight for added convenience on the trail or around the campsite: hold down the activation button for three seconds to illuminate the darkness.

Rugged design and construction trusted by thousands of endurance athletes. Adventurer Opti is powered by two CR123 batteries making it lightweight and keeping it operating effectively in even cold environments. The long-lasting UV lamp provides 8,000 water treatments! This Adventurer Opti works in containers with a minimum 1.75 inch diameter opening. (Like Nalgene wide-mouth bottles one liter bottles.)

Contents: SteriPEN Adventurer Opti, two disposable (non-rechargeable) CR123 batteries, neoprene case with belt loop, and user’s guide. Three year limited warranty.

Product Specs
Weight 3.8 oz
Dimensions 6.1 x 1.5 x 1 in
Lamp Life 8,000 treatments
Battery CR123 (included with purchase) or RCR123
Battery Life Disposable — 100, 0.5 liter treatments
Rechargeable — 80, 0.5 liter treatments
Minimium Bottle Diameter 35mm (1.4 inches)
Filter Compatability none
User Guide en | fr | es | de
FAQs SteriPEN FAQs | Adventurer Opti FAQs
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We have cycled thousands of kilometers, from the United States to El Salvador and we have used our SteriPEN Adventurer Opti every day while riding to purify our drinking water.
Nico El Salvador
Andrea Rees
Loving my Freedom @SteriPEN, what a difference and that's just in Paris & Nice so far! Love that I can get clean water anytime, anywhere.
Andrea Rees Paris, France
Lea Conlon
During our 5 week Hugging the Coast Kayak Expedition (research on seaweed) in northern Sulawesi, Indonesia we use used our SteriPENs every day! 
Lea Conlon Indonesia

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Reviews (2)

1 review for Adventurer Opti

  1. Highlander
    5 out of 5


    I’ve had my SteriPEN Adventurer for several years and done several months of pike packing in the Colorado Rockies and this is the best form of purification I’ve ever used (I grew up in the Colorado mountains and used iodine then pumps in various forms). This is simply lighter and far simpler. I’ve used it in cattle country, after filtering through a bandana, without issue. My one suggestion is to make the shorter time be one click rather than two (which should be the longer time).

    • SteriPEN Marketing Team


      Hi Hilander! Great to hear from you and glad you’re making good use of your Adventurer Opti! Just wanted to explain the click order is a safety feature … if a user mistakenly clicks only once, we prefer them to over treat rather than under treat, thus one click indicates one liter in some SteriPEN models. SteriPEN models with LED displays don’t require this safety feature as the user can verify the selected treatment size. Thanks again and please feel free to share your adventures with us at

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