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Regular price $32.95
Regular price Sale price $32.95
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The simple and sustainable way to make your tap water taste great, with a 2 year supply

Color: Black


Two years’ worth of charcoal water filters using a traditional Japanese Binchotan method for cleaner tasting water. Filter your tap water naturally with binchotan charcoal. It removes contaminants and leaves your water tasting clear, pure and delicious. Sustainably sourced and produced in Laos following traditional Japanese methods, it’s made from the branches of fast-growing native trees harvested from protected woodlands to ensure minimal impact on the local environment. A fantastic way to avoid single-use bottled water and save money, Active Charcoal Water Filters make it easy to stay hydrated all day.
  • Removes Chlorine
  • Adds Minerals
  • Natural Water Filter lasts for 6 months


    • EGS004
    • It makes tap water taste clean, clear and delicious
    • x4 Binchotan active charcoal filters (6 months life each)
    • Vacuum packed individually, pre-washed and ready to use immediately
    • Can be used in our Eau Good bottle, or any jug or bottle (*minimum spout opening 1.2in)
    • Charcoal is an incredibly dense material, so please take care when dropping into glass bottles & jugs, we recommend only adding once bottle/jug is full
    • Our charcoal is made from natural wood sticks and dimensions vary (0.6 to 1.1in diameter, maximum length 4.6in)


    When was Binchotan charcoal first used?

    About 1,200 years ago, a form of Binchotan charcoal, also called ‘white charcoal’, was thought to have been used in Japan by a Japanese monk, and scholar named Kukai. But it wasn’t until the Edo Period in the 17th century that it became really popular.

    How do you make Binchotan charcoal?

    A kiln is set to a relatively low temperature to heat a piece of sustainably sourced wood for a long time. Near the end of this heating process, the kiln’s temperature is increased to 1832°F until the wood is red hot. It’s removed from the kiln and placed under a combination of sand, soil, and ash which rapidly cools it, and leaves a white residue. This is why you may hear of Binchotan charcoal referred to as ‘white charcoal’. After this cooling process, the surface will become hard and smooth and if you tap, it will make a metallic sound.

    How does it filter impurities?

    Binchotan charcoal doesn’t just remove impurities, it also is able to release minerals like potassium back into the water. It’s covered in tiny little cavities that attract impure ions like chlorine and binds them to the charcoal, leaving the water filtered. In fact, there’s so many of these small holes that just 0.04oz of charcoal has enough surface area to cover one tenth the size of a soccer field!

    What amount of water can be filtered with a charcoal stick?

    If you want to use your bottle every day, you can filter about 37fl oz of water for 3 months. Just add more charcoal sticks if your container or jug is larger.

    How long does a charcoal stick last?

    Filling your bottle once a day, every day for 3 months will require the charcoal to be boiled for 10 minutes to recharge it. Then you can use it for another 3 months.

    What should I do with my charcoal stick when it’s done?

    There are many things you can do with Binchotan charcoal after you’ve finished using it: it removes bad smells if added to cat litter trays or nappy bins, it removes moisture from the air if you add it to your wardrobe or drawers, and it adds nutrients to the soil if you pop it in with your houseplants (break it up first).

    Should I wash my charcoal?

    No, it’s already washed and can go straight into your bottle.

    What else can I add to the water with my charcoal stick?

    You shouldn’t add anything else to the water you want to filter with a charcoal stick, this includes fruit, herbs, teas, or infusions.

    Is charcoal bad for you if you swallow it

    Sometimes, small pieces or flakes of charcoal will break off and be found floating in your water. Don’t worry if you should swallow any of these, they are not dangerous. In fact, charcoal is sometimes used to treat things like upset stomachs, diarrhea and even hangovers.

    How do I wash my bottle if the charcoal is in it?

    Simply remove the charcoal stick before washing any bottle, carafe, or other vessel with soap.

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    why charcoal for filtering water?

    As an active carbon, charcoal works by attracting the negative ions in impurities like chlorine, and binding them to its surface. It has been used in Japan to purify and soften water for centuries.

    how do i use it for filtering water?

    Our binchotan charcoal can be used immediately - simply remove it from its packaging and place it in any bottle or jug. Once filled with water you’ll notice an improvement in taste after about an hour.

    does it ever stop working?

    If used daily to filter 37 fl oz of water, each stick will last about 3 months. You can then “recharge” your charcoal stick by placing it in boiling water for 10 minutes. This process reactivates the charcoal and removes the contaminants that have been building up on its surface and allows it to filter your water for another 3 months.

    what to do if it breaks?

    Your charcoal will still work even when broken. However, if you’d prefer to buy another, you can still use the broken pieces in many different ways. To know more about this, have a look at our blog.

    A word from the designer

    As a designer, when searching for a solution, it is always good to look to the past for inspiration and also other countries. We discovered in Japan they have been using Binchotan Charcoal to filter their water for centuries. The advantage this material has over so many other commonly used filters in the West, is that it has no additional plastic packaging, allowing it to be recharged and used for six months and even have many secondary uses after this. Since this discovery, we have been educating the market on the advantages of Binchotan Charcoal as a water filter, all aimed at encouraging people to drink their local potable tap water by making it taste better and to stop buying bottled water which is bad for the planet (if in doubt why it is bad, watch the Story of Stuff video here).