I've used the Katadyn filters for a while now. If you're considering the "Hiker" model, you might also look at the "Guide" model. It is a little larger, but, filters more water faster. We broke the pump handle off our Hiker model, and replaced it with a Guide filter. You can now get an inline attachment for the Guide so you can put it on top of a widemouth 1L Nalgene bottle and pump directly into the bottle.