nv - 02 Ago 2017
Take the filter out, fill the bottle on a stream or a water pool, put back the filter and drink as much water as you want. Is that simple.
When trekking with kids I use it for filling water bottles and is by far the fastest and easiest filter i've ever used, ever.
It is very close to perfection and almost no weight at all. sure, with use it will eventually become clogged or punctured (everything has a limited lifetime) but until that happens it is the simplest and most effective filter of all times.
It is just perfect.