Lifestraw
The membrane filters use hollow fibre technology (similar to that used in kidney dialysis) with microscopic 0.2 micron pores - dirty water enters one side and clean water passes through the pores and contaminates are blocked.
LifeStraw membrane microfilters (Peak Series & Go Bottles) remove 99.999999% of bacteria, 99.999% of parasites & 99.999% of microplastics. LifeStraw Ultrafilters (Mission series) with a pore size of 0.02 microns also removes 99.999% of viruses.
With simple cleaning procedures, LifeStraw filters give exceptional long lasting performance and a proven track record second to none.