Fine bamboo charcoal stick to use and insert into a bottle or fine-necked container (with an inside neck diameter> 2cm) to naturally purify and mineralize running water. The thin stick has a diameter of 1 to 2 cm and a height of 13.5 cm. A thin stick purifies and mineralizes between 500 ml and 1 liter of water: it will give a pleasant taste to running water. Before first use, boil the bamboo charcoal stick for 15 minutes to activate it, then let it dry. Then place the stick in a bottle or gourd filled with tap water. Leave to soak for at least 1 hour. After 1 to 2 months of use, reactivate your charcoal by boiling it again. The total shelf life of the product is equivalent to 6 months. At the end of its life, recycle it by using it as a plant fertilizer or as a deodorant in your cupboards.