LifeStraw Personal Water Purifier for Hiking, Camping, Travel, and Emergency PreparednessProtects against 99. 999999% of bacteria (including E. coli, Salmonella); 99. 999% of parasites (including Giardia and Cryptosporidium); 99. 999% of microplastics, silt, sand, and cloudiness Ultralight and durable, the LifeStraw weighs less than 2 ounces (46 g) so you can pack it anywhere Long lasting membrane microfilter will last up to 1,000 gallons (4,000 L) of water, thats enough drinking water for an individual for over 5 years Be prepared with