This is the basic model of handheld UV purifier, marketed to outdoors enthusiasts. It uses four AA batteries to power a UV element that fits into a glass or bottle of water. These batteries should provide around 200 treatments before needing replacement, while the UV lamp itself is rated for an 8,000-treatment lifespan. This model, which weighs 5.7 ounces, is also marketed to tourists and emergency workers as the Steripen Traveler and Steripen Emergency, respectively.
The Steripen Journey LCD includes an LCD display that lets the user select how much water to purify. It uses smaller CR-23 batteries that should last for approximately 100 treatments (40 using rechargeable batteries). It is smaller and lighter than the Steripen Classic, weighing in at 4.6 ounces.
The Sidewinder is powered by a crank handle, meaning that no batteries are needed to run the UV light, which is rated for 8,000 treatments. It is a larger and heavier unit, weighing 16.6 ounces including a built-in water bottle.
The Adventurer Opti is the smallest handheld purifier in the Steripen line, and includes an optical water-quality sensor that doubles as a flashlight. It uses two CR123 batteries, and weighs 3.6 ounces. It can be purchased with a solar-panel charging cover to extend its battery life.
These models are similar to the Classic and Adventurer Opti, just re-labeled to appeal to tourists rather than outdoors enthusiasts. The only difference is that the Traveler Mini does not include the flashlight or optical sensor that the Adventurer Opti offers.
These models are repackaged versions of the Steripen Classic and Adventurer Opti marketed to military users. They are the same physical models, but available in military green and sandy colors that allow them to blend in with armed forces colors.
