Charcoal Water Filter With Stainless Steel Coil Stainless steel coil securely holds the charcoal filter inside your reusable bottle without scratching and prevents any rattlingBinchotan Charcoal: The Japanese have been doing it for centuries - using a stick of charcoal to purify drinking waterSimple to use: the charcoal stick water filter comes ultra-sonic cleaned and ready to use, all you need to do is fill your bottle with drinking tap water and enjoy great tasting waterLong-lasting: The sticks have a total lifespan of 6 months each, as its effectiveness decreases all you must do is boil it for 10 minutes to rejuvenateUse in any bottle: The charcoal water filter sticks are suitable for a bottle, carafe or jugHealthy hydration: The activated charcoal water filter attracts the ions of contaminants to the surface of the carbon, and at the same time releases minerals such as calcium, iron and magnesium back into the waterGreat for those who want to eliminate plastic water bottles and still have great tasting, filtered water *Suitable with all water bottles sold from our site (wide spouts)