Set of 12 Binchotan activated carbon - Size M. 1 stick purifies up to 2 liters of water approximately; Binchotan being a natural product, each stick is unique. Our Binchotan activated carbon comes from the Wakayama region in Japan, respecting the traditional and environmentally friendly methods of yesteryear. Our charcoal comes only from Ubame oaks offering better quality wood. A piece of Binchotan activated carbon can be used for 3 to 6 months. When coal has lost its properties, you will quickly notice: the taste of water will no longer be the same. The binchotans will be delivered in kraft cardboard boxes.