Finerfilters Personal, Portable Water Filter Straw with added Carbon FiltrationMicrobiological Water Purification filter, Ideal For Camping & Hiking etc. The Finerfilters Water Straw contains no chemicals, no batteries and no moving parts to wear out.It is perfect for the ultralight backpacker, camper, hiker, traveller, boy scout, hunter or for emergencies.It features a high flow rate and includes activated carbon media to eliminate unpleasant tastes in water, eliminate pesticides and residual pollutants; eliminate harmful substances such as chlorine, tetrachloroethylenes, perchloroethylenes and trihalomethanes.The Finerfilters Water Straw does not filter, salt, viruses or heavy metalsShelf life has been extended to 5 years!Microbiological Water Purification filterFilters a minimum of 3,000 LitresRemoves a minimum 99.9999% of waterborne bacteria.Removes a minimum 99.9% of waterborne parasitesUses 0.01um Ultra Filtration Membrane Cartridge.Also includes 22g of Carbon to remove chemicals / chlorine taste & odour.Passed Germany TUV SUD Test.Removes 99.99% of harmful bacteria like E.coli, bacillus, legionella, salmonella. Keeps your water safePlease NOTE: It takes roughly 3-5 seconds of sucking to start the flow of water through the filter.