Have your friends and colleagues salivating with envy when they see you with black+blum's super cool Eau Good filter water bottle! It looks amazing but most importantly it makes your tap water taste great. The Japanese have been employing this clever filtration method for over 500 years, using the active charcoal (the Japanese call it Binchotan) with its porous surface to remove all the chemical from your water. If you consider yourself a trend setting early adopter fashionista, then this is the water bottle for you. 'Remove the binchotan from the bottle before washing with soap. Color: Purple.