Eau Good

A filter water bottle that uses a traditional Japanese binchotan charcoal to make your tap water taste great.


£14.95
-
+

It makes tap water taste great!

BPA free tritan, cork, stainless steel, silicon

Includes x1 binchotan active charcoal filter (6 months life)

W 8.5cm  H 24cm

W 3.3"  H 9.4"

800 ml  27 floz

What is the history of Binchotan charcoal?
The origins are not completely clear, but it is believed that a form of Binchotan charcoal (sometimes referred to as 'white charcoal') was introduced to Japan by a Japanese monk and scholar called Kukai 1,200 years ago. It was during the Edo Period (17th century) that a man called Binchuya Chozaemon made it popular. 
How is it made?
Sustainably sourced wood is placed in a kiln and charred at a relatively low temperature for some time, then, near the end of the process, the kiln temperature is raised to about 1000 degree Celsius to make the wood red-hot. The charcoal is then removed and quickly covered with a special powder made from earth, sand and ash, and this gives the charcoal surface a whitish hue (explaining the name 'white charcoal'). The rapid rise in temperature, followed by a rapid cooling, incinerates the bark and leaves a smooth, hard surface. If you strike it, you'll hear a clear, metallic sound. 
How does it work?
Binchotan charcoal has an incredibly porous surface with tiny cavities oriented in many directions. Just 1 gram has a surface area in excess of 500 m2 (about one tenth the size of a football field). It is also known as active carbon as the ions of contaminants are attracted to the surface of the carbon, where they will be held. It is also able to release minerals such as calcium, iron and magnesium back into the water which enhances its taste and health benefits. 
How long will it last?
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.
What other uses does the binchotan have?
When you have finished using your binchotan as a water filter, it still has many secondary uses.  If you break it up and put it in your house plants, it will add nutrients to the soil that will help the plant to grow. Because of its porous surface, it can be used as a deodoriser to remove unwanted odours in your cat litter, laundry basket, nappy bin or shoes. Binchotan is also an effective moisture absorbent, and can help absorb humidity in the air if placed in a wardrobe. 
Do I need to wash my charcoal?
Your binchotan charcoal is already washed and ready to use. Please do not wash with detergent or soap. 
Can I use my binchotan with flavoured water?
Please do not use with flavoured cordials or juices. 
Can I wash my bottle with soap and leave the charcoal in it?
Please remove the binchotan from the bottle before washing with soap. 
Where can I order more charcoal from?
Is it dangerous if I swallow a bit of charcoal?
Occasionally you will notice tiny particles / fragments of the charcoal in the water, but do not be alarmed as it will do you no harm if you swallow them (active charcoal tablets are prescribed to treat diarrhoea, digestion and flatulence).
How should I clean my bottle?
We advice to wash this by hand with hot soapy water and a bottle brush. Although the bottle and metal clamp are dishwasher safe, the fabric tag will not withstand frequent dishwashes. The silicon seal on the cork can be removed and is dishwasher safe. The cork is not dishwasher safe.
How do I prevent mould from forming on the silicon covering the cork stopper?

Make sure you do not leave water sitting in your bottle, when you are not using it (for more than one day). Remove the stopper and allow it dry out. When water is left in the bottle for long periods of time, mould spores can form. The binchotan charcoal removes the chlorine from drinking water, so you might notice it forming even quicker than normal. This is nothing to worry about, as long as you are refilling regularly, cleaning the bottle regularly and not drinking stale water that has been sitting in the bottle for more than a day.

How do I clean mould from the silicone covering the cork stopper?

We recommend using lemon juice, followed by boiling water, to kill and wash away mould that has formed on the silicone.

£1.00
Eau Good - Replacement Cork

Cork Lid

Eau Good - Replacement Cork

A word from the designer

This was a great project to work on. The aim 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.

Helping the environment

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.

How does it work?

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

How long will it last?

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.

Ancient technology

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.