The Eau Good Glass carafe from Black+Blum has an elegant design and filters your water. The screw cap makes it easier to open and close the bottle, while also providing safe and leak-proof properties. The wood fiber cap has the aesthetic appeal and is durable. The stainless steel carrying loop makes it convenient to hold and unscrew the bottle. The silicone seal is easy to remove for thorough cleaning, and the stainless steel cover on the bottom ensures plastic-free contact with your water.The cover is made of recycled polyester. It protects the glass, provides insulation (to keep your drink cool), makes the bottle easier to hold, and prevents condensation on the outside. The borosilicate glass is tasteless, and in combination with the charcoal filter it gives you the best tasting water and drinking experience.A stainless steel coil holds the charcoal in place even without water, so it doesn't move or rattle in the bottle.Binchotan charcoalIt may seem counter intuitive to purify your drinking water with a stick of charcoal, but the Japanese have been doing it for centuries. 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.Fill the bottle with water and add the charcoal. Leaving it overnight is ideal, but after an hour you can actually taste the difference. If you notice that the effectiveness of the filter decreases over time, you can recharge it by boiling it for ten minutes. Boiling rinses away the impurities and allows the charcoal to absorb more.- BPA-free- Made of hand blown borosilicate glass- Dishwasher safe- Charcoal included