Using only the highest grade Binchotan charcoal, our water filters provide an ecological and effective way to remove impurities from your tap water. Binchotan charcoal also improves the taste of tap water with its high mineral content and water-softening properties. Binchotan charcoal naturally absorbs toxins from tap water and imparts good minerals such as calcium, potassium, magnesium and phosphates to water. One filter can last up to 6 months. Simply toss it in the compost after its lifecycle is complete. How to use it? Binchotan charcoal does not require much handling. To use it as a water purifier, just let it sit in a jar of water for 6 to 8 hours and enjoy!