Each page is impregnated with anti-bacterial silver and copper nanoparticles with killing capabilities--killing of bad flora and fauna, not people.
They tested it at the Univ of Virginia on simulated "bad water" and then on "real" contaminated water in Africa.
Even with the worst contamination, the "pages" of the book, with their silver and copper-nanoparticle paper, filtered out 99.9% of the dangerous stuff.
Each page of the book is printed with water safety instructions, both in English and in the target country's language.
A page cleans 26 gallons--and the whole book would last an individual 4 years.
Cool, huh?
