Simply fill the flask with water, attach the cover and Shake free the debris. Or, remove the Filter from the flask and swish in any lake, River or stream. Just smash, stash and go! Hydrapak soft flask is longer lasting, rugged, high-tech, flexible, bpa-freeno backflushing and no clumsy tools.
On long mountain bike rides I really enjoy not needing to carry the weight of 3 litres of water on my back. After trying out this filter from a friend I knew it was a wise choice to find one of my own.
No more incessant pumping the old style filter to get drinking water from a lake or stream.
The flexible plastic bottle could be punctured by a tool or something pointy in the pack, though. Recommend carrying it in a protective sleeve or case of some kind.
The bottle Is very usefull and handy for trevels ( hiking, bicycle etc). fill this flask a water from any source (rivers, pounds)and it is drinkable. No need to carry water (extra weight). But it's uncomfortable to drink from a half-empty bottle because it's soft.
My recommendation!