Finally, we can get rid of our crappy Brita Water Filters and go with something a little more 'green'. The charcoal is biodegradable, and can be used up to 6 months. I think this might even be cheaper than buying those $10 filters every 3 months! Plus the design is TO DIE FOR! Using Iouseki stones and Binchotan charcoal, the Charcoal Water Pitcher creates filtered, mineral-rich water. The stones come from the mountains in Kanazawa, the capital city of Ishikawa Prefecture, on the Sea of Japan coast.