This bottle is designed for filtering water from streams, lakes and waterfalls. Then we just screw the filter on the bottle and by rolling, squeeze the unclean water into the filter.
This excellent gadget will definitely come in handy on your adventures. Among other things, the bottle rolls up all the way so it is easy to store and light weight, it uses very little of the space in your backpack.
Buy SAWYER® Collapsible Bottle 1 litre, set of 3 pcs for € 18