Authentic Kishu Charcoal – To Go for Water Bottles. The Only Authentic, Certified & Tested Charcoal Water Purifier. Made by Japanese artisans. Absorbs toxins in tap water.;

Kishu is a simple stick of activated charcoal which is made by heating branches of sustainably harvested oak trees in hand-made kilns. The resulting glass-like material gives it an amazing ability to bond with toxins in water. Kishu also imparts good-for-you minerals. One stick lasts four months after which it can be reused as a deodorizer or broken up and used in the garden as bio-char for water retention.