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  • Simple, cartridge-free charcoal filter design
  • Minimal & functional
  • Purifies ordinary tap water in a 100% eco-friendly way
  • Pair with Kuro-Bo’s Go-Eco glass water bottle for 100% natural and portable filtered water
  • Removes bacteria (e.Coli), toxins & chemicals, including chlorine, lead & mercury
  • Balances the water’s pH level
  • Enriches every glass of water with minerals like calcium & magnesium
  • Improves the taste of your tap water
  • 1 pack of charcoal koins lasts up to 3 months
  • Koins & packaging are 100% recyclable
  • Charcoal also makes an excellent dehumidifier & deodoriser in damp areas of your home
  • Used charcoal can be repurposed as garden fertiliser


  • Remove the Kuro-Bo koins from their packaging & boil it in a shallow pan of tap water for 10 minutes.
  • Allow the charcoal to cool, then fill your water bottle with tap water. Add the charcoal koins.
  • For best results, allow the charcoal to rest for 3+ hours, although they start purifying immediately, either at room temperature or in the fridge.
  • After 1 month of daily use, reactivate your charcoal koins. Simply boil it again for 10 minutes, allow them to cool, and reuse as before.
  • Repeat the reactivation again after 2 months of daily use.
  • After 3 months of daily use, recycle & replace the charcoal.



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