The LifeStraw personal water filter, designed by Vestergaard Frandsen, allows users to drink water safely from contaminated water sources. LifeStraw is ideal for campers, travelers and hikers who may be drinking from rivers or lakes and are unsure of the water safety. It is the most advanced personal water filter available today. LifeStraw surpasses EPA guidelines for E. coli, Giardia, and Cryptosporidium oocysts, rigorous standards for water filtration.