Suspect water needs worry-free, hassle-free filtration and that’s what you get from this freestanding Katadyn Drip product. No electricity. No pumping. No moving parts. No effort. Just set it up, fill the container, and let gravity pull water through the system. You can confidently treat larger quantities – 4 litres/hour into a 10 litre container – making it a must-have for groups, base camps, huts, cabins or recreation areas. The Drip Gravidyn model adds activated carbon to reduce chemicals for the extra benefit of better taste and smell.