Experience pure, mineral-rich water with the handmade Kishu Binchotan from Sort Of Coal. This 18 cm natural charcoal piece from Japan acts as an eco-friendly filter, enriching your water with essential minerals like potassium and magnesium. Simply sterilize by boiling for 5 minutes, then soak in cold tap water for a minimum of 2 hours (ideally overnight) before chilling. For optimal longevity, store the Binchotan in a dry container when not in use.