SteriPen Adventurer Opti UV Water Purifier

The SteriPEN Adventurer Opti is the smallest and lightest UV water purifier in the lineup, weighing just 3.6 ounces (103g) with batteries, making it the ideal choice for ultralight backpackers, hikers, and endurance athletes who count every gram. Its powerful UV-C lamp destroys over 99.9% of bacteria, viruses, and protozoa (including Giardia and Cryptosporidium) without chemicals, leaving no aftertaste. The device treats 0.5 liters in 48 seconds or 1.0 liter in 90 seconds with a simple one or two-click operation, and its revolutionary optical water sensor doubles as an integrated LED flashlight — hold the activation button for three seconds to illuminate the darkness. The long-lasting UV lamp provides 8,000 treatments, while two included CR123 batteries deliver approximately 50 liters of purified water per set. The Adventurer Opti is designed for use with clear water in containers with a minimum 1.75-inch (35mm) diameter opening, such as wide-mouth Nalgene bottles, and comes complete with a neoprene carrying case.

• 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
• Minimum Bottle Diameter: 35mm (1.4 inches)
• Filter Compatibility: none

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