Authentic Japanese binchotan charcoal is an excellent natural water purifier. It filters tap water by removing heavy metals and chemicals, while enriching the water with minerals and trace elements for better taste and higher quality. Its manufacturing process is completely healthy and natural, cooked at low temperature and naturally activated by hot steam. We recommend boiling the binchotan charcoal every 3 to 4 weeks to clean and activate it, and it can purify a pitcher of water for approximately 6 months. It is also ideal for enhancing the taste of coffee in the coffee maker.