Pack of 30 Japanese bamboo activated carbon (flat) in bulk Details: Weight: approx. 20g per stick Filter between 0.5 and 1.5L of water 6 months of use per stick Manufacturing: Origin: Japan (Kochi prefecture) Takesumi features: Eliminates chemicals and heavy metals Greater filtration than oak (larger filtering surface) Preserves minerals and trace elements Improves the taste of water 100% recyclable and compostable How do I use Takesumi? At the first use, put the charcoal for 10 minutes in boiling water Let your charcoal dry for a few minutes Let the charcoal work for 2 to 4 hours Your water is purified! 1% of coal sales are donated to our partner NGO working for reforestation in the Amazon.