Make your tap water taste great! This natural charcoal water filter upgrades any standard bottle into a ‘filter bottle’ using a traditional Japanese Binchotan charcoal method for cleaner tasting water. Removes Chlorine Adds Minerals Natural Water Filter lasts for 6 months Binchotan is an active carbon made from tree branches and is renowned for its ability to soften water, add good minerals and absorb unwanted tastes and odours, such as chlorine.  The charcoal stick is vacuum packed individually and is pre-washed and ready to use. Fits virtually any bottle, minimum spout opening 30mm. At the end of its life this completely natural product can be added to your compost bin, broken up and added to plants as fertiliser, burned on the fire or even used as a shoe deodoriser! How does it work? Your charcoal is ready to use. Simply fill your bottle/carafe with drinking (potable) tap water and wait for the charcoal to filter impurities from the water. Leaving it overnight is ideal, but you will taste the difference after just one hour. Then, enjoy great tasting water! How long does it last? With time, you will notice a decrease in the filter’s effectiveness on the water taste. You can then recharge it by simply boiling it for ten minutes. The boiling washes out the impurities and frees the charcoal up to absorb some more. Some people have more sensitive taste buds than others so if you notice the decline in taste before 3 months has passed, then it is absolutely fine to boil it at that stage too.