Overview SteriPEN is now known as the first and fastest portable UV water purifier available. It kills viruses, bacteria and protozoa—including Giardia and Cryptosporidium —in 60 seconds per liter. What Makes It Unique SteriPEN Ultra features a user-friendly OLED (Organic Light Emitting Diodes) display. This display gives you a countdown, sad face when taken out [...]

I’ve had my Steripen Classic for over two years now... It’s been a great water purifier for me, and I’ve used it in a variety of different situations. Let’s run through the criteria I rated it on: Functionality: The Steripen can be either swirled around in a Nalgene bottle (or similar) or fitted into a large mouth [...]