•Black + Blum charcoal filter water bottle to keep you hydrated. •Reduce plastic consumption with this alternative to bottled water bottles. •Benefits of binchotan charcoal: softens water, balances pH, adds minerals, and absorbs contaminants like chlorine. •Operation: place the charcoal, fill with tap water, wait for the charcoal to remove impurities (filter lasts 6 months). •Specifications: BPA-free material, natural cork, stainless steel and silicone, 800 ml. •Filter care: hand wash with hot water and soap, natural cork is not dishwasher safe.