Water filters for the Road

The filter is robustly built, has a good flow rate and seems to work. (Neither passengers nor I have become sick - of course I do not know how dangerous the unfiltered water would have been actually)

The included 0.5-liter bag is unfortunately too small. One also gets him not quite full and therefore filter on forever if you want to fill water bottles for a day trip. (Unfiltered water we did not want to take away - we did not want to drink from the wrong bottle by mistake!)
Of course you can any bottle screws on the filter but then you have to squeeze the bottle, then unscrew to let air into the bottle, then screw down again and squeeze again etc etc ... I would recommend to anyone, a 2 liter bags . Buy (More space than the 0.5 liter bag not used.)

From a friend I was then pointed out that 0.1 micron filters out not everything! You should read the Wikipedia articles on Picornaviridae (size of 22-30 nm) before buying the filter. The product promises not to eliminate these viruses from the water, but it should be noted also no word on the possible danger!
I think that somehow negligent.

All in all I am quite satisfied. The whole set is very compact and light and you feel the drinking water of dubious significantly safer - as long as you do not think about viruses.