Leave it to the good people over at MAKE.com to find a cheap alternative to the Life Straw.
Ideal for hiking, camping, travel in foreign countries, and emergency use.
* Removes pathogens as small as 2 microns, including Giardia, Cryptosporidium and E. Coli bacteria
* Activated carbon filter removes chemicals and improves taste
* Super compact, fits in a pocket
* Treats up to 20 gallons of water