Ultralight UV Water Purifier - Water-Activated USB Rechargeable Pen, 3 Oz, Purifies 1L in 90 Seconds - Camping, Backpacking & Travel

The SteriPen Ultralight is a 3-ounce pen-style UV water purifier built for thru-hikers, ultralight backpackers, and travelers who count every gram. The compact pen-style form factor drops into any pack pocket, vest pouch, or hydration bottle. Water-activated operation starts on contact so you cannot leave it running or forget to trigger it - no button to forget, no accidental battery drain inside your pack. UV-C light destroys the DNA of bacteria, viruses, and protozoa in clear water in 90 seconds (1L) or under a minute (0.5L) without chemicals or taste change. USB rechargeable - no more hunting for backpacking batteries in small mountain towns. A single charge delivers approximately 20 treatments, enough for a full multi-day solo trip. The 8,000-treatment UV lamp delivers years of reliable use. Best used with clear water sources; pre-filter cloudy water first for full effectiveness.