Purism / water purifier

Purism is most simple water purifier that is comprised of four different types of filters for water purifiers. It is designed to be carried anywhere, any situations such as disaster area. It is more affordable and effective than other water purifiers with aid purpose.
748 million people – roughly one in ten of the world's population – have no choice but to get water from wherever they can, whether it's a dirty pond or an expensive water vendor.
Purism has 4 types of filters. Filters are made of paper which has water resistant. Filters are coated with activated carbon powder or silver nano particles.