Carry the untreated water in a two liter clear pop bottle in the sunshine and the UV will dispatch a good number of any bacteria in the water. Then the lifestraw would get any remaining.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.