Efficient, durable, and robust water treatment is especially important when embarking on extreme adventures. The sturdy Katadyn Pocket is a small yet reliable filter that should always be on hand to ensure a healthy and sufficient supply of drinking water. For decades, military and rescue services around the world have trusted the Pocket to purify water from bacteria and protozoa. With a flow rate of 1 liter per minute, the silver-impregnated ceramic filter also offers significant time savings. The steel, nearly indestructible filter comes with a 20-year warranty—a testament to its reliability that you can truly count on.