Binchotan active charcoal has been used as a water purifier and softener since the 17th century in Japan. It reduces chlorine, mineralises the water and balances the pH. The binchotan active charcoal has a filter life up to 6 months and thereafter recycles for a number of uses. Over 22 billion plastic water bottles are discarded around the world each year. Eau Good hopes to make tap water taste better and thereby encourage people to stop buying bottled water.