Eau Good Charcoal Water Filter

Via Cool Hunting:

From design powerhouse Black + Blum comes a stellar new alternative to wasteful disposable water bottles. Eau Good uses Binchō-tan, a traditional Japanese charcoal, to naturally filter tap water over the course of six hours. The plastic bottle has a small indent to hold the charcoal in place while drinking, and a simple squeeze releases the piece for replacement. Held in place with a metal ring, a natural cork stopper secures the opening.


Sourced from sustainably harvested timber, the charcoal is created by burning the wood at a precise 1000 degrees celsius. Once activated, the filter rids water of chlorine and other odors while balancing pH levels to deliver a natural, clean finish. While many filters currently use processed charcoal, Binchō-tan has a longer shelf life and is recyclable as a fertilizer and deodorizer. The charcoals—only $3.70 per piece—can be reactivated by boiling after three months for an average life of six months.


We recommend picking up a pair from the Black + Blum shop to keep your cold, clean water in constant rotation.

Binchotan active charcoal has been used in Japan as a water purifier since the 17th century. It reduces chlorine, mineralises the water and balances the pH. The binchotan active charcoal can be used for up to 6 months and amazingly recylces for many different uses after this.

Over 22 billion plastic water bottles are discarded around the world every year. We want to reduce this by making tap water taste better and encourage people to stop buying bottled water.


  • BPA free tritan, cork, stainless steel, silicon
  • includes x1 binchotan active charcoal filter (6 months life)
  • 8.5 x 24cm – 800 ml / 27 floz