Vestergaard life straw

never used filter pore size 0.2 microns lifetime capacity c 4000 litres, 1000 gallons weighs 57 grams/2 oz. BPA free Protects against - 99.999999% of bacteria (including E.coli, Salmonella), - 99.999% of parasites (including Giardia and Cryptosporidium), - 99.999% of microplastics, dirt, sand and cloudiness