Black + Blum

Eau Good Duo


A durable 700 ml / 24 fl oz sports bottle that either infuses your water with fruit or filters it with a traditional Japanese Binchotan charcoal method for a cleaner, purified taste.

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Black + Blum

London, UK

High Quality Reusables

Black+Blum design high quality, reusable, leakproof lunch boxes & water bottles. They're built to last a lifetime and are designed to help you lead a sustainable & healthy life.

Our mission is to employ rigorous attention to detail and a focus on sustainability to design original products that inspire a sense of well-being, and our aim is to become design leaders and innovators in our product sector.

Eau Good Duo
Eau Good Duo

A durable 700 ml / 24 fl oz sports bottle that either infuses your water with fruit or filters it with a traditional Japanese Binchotan charcoal method for a cleaner, purified taste.

  • Removes Chlorine
  • Adds Minerals
  • Natural Water Filter lasts for 6 months
  • Built-in infuser cap
  • Hand strap for running
  • 100% leakproof
  • Easy to disassemble & dishwasher safe
  • BPA Free

The aim with bottle was to try and create a bottle design that harked back to old victorian bottles and had a modern, but almost retro utilitarian aesthetic. This is why we used a cork stopper and stainless steel lock wire. We didn’t want to use glass, due to fragility, but wanted to make it look like glass and have a similar visual appeal.

The refraction of light in water can be beautiful and we took this into consideration when designing the shape. We also wanted to keep the design minimal and not add extra parts to lock the charcoal in place. It was a real challenge working out how to get the bottle to deform correctly and required lots of model making to perfect the design.


Over 22 billion plastic bottles are discarded around the world each year. We aim to reduce this by making tap water taste better and encourage people to stop buying bottled water.


Simply drop & lock your charcoal into the bottle. Fill with drinking (potable) tap water. Wait for the charcoal to filter the water overnight is ideal, but you will taste the difference after just one hour). Then, enjoy great tasting water!


If you are using your Binchotan with our 'eau good' bottle and fill it up once a day, then it should last three months. You are then able to recharge it by boiling it in water for ten minutes and then leaving to dry in sunlight. You should be able to keep recharging it for a further three months.


Binchotan active charcoal has been used in Japan as a water purifier since the 17th century. It reduces chlorine, mineralises the water and balances the pH. The binchotan active charcoal can be used for up to 6 months and amazingly recycles for many different uses after this.



*We are currently only offering UK shipping at present*

  • Hibana order from one brand shipping fee - £4.95
  • Hibana order from two or more brand’s shipping fee - £6.95

See product description for any offers relating to free shipping

Estimated delivery time of 3-5 days working days

We are a marketplace and do not hold any stock. Products are shipped from the brand, directly to you.

Please note if you order from more than one brand expect to receive separate delivery packages.

Many of the products we sell are handmade and made to order, and shipping times can sometimes vary. We will endeavour to keep you up to date with any delays to shipping. For any queries relating to your shipment you can email us at


If you are not satisfied with your purchase we are able to process a refund for the items as long as we are notified within 14 days of you receiving the goods subject to the below conditions.

To request a refund or exchange you must inform us, rather than the brand, Please email and provide us with the email address you used to make your purchase, along with your order reference number.

As we are a multi-brand marketplace we will provide you with the returns address to send the item directly back to the brand. The brand will then inspect the returns and we will inform you of whether the return/exchange has been approved.

If the return is due to shipping error or damaged items the brand will cover the cost of returning the item. In all other cases you are responsible for the cost of sending the item back to the brand, unless the brand specifies that they offer free returns.

Note that all items must be unused and returned in the original packaging, unless otherwise approved by the brand.

Once a refund has been approved, you will receive the appropriate amount within 14 days of the item being received by the brand. For an exchange, you will receive the item in the normal delivery time.

Sealed products which have been opened, such as beauty and hygiene related products as well as gift vouchers and made to order/personalised products are not suitable to be returned unless faulty.

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Eau Good Duo
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Eau Good Duo