Is there a fluoride filter for the Sport Berkey Water Bottle?

 Fluoride is very difficult to remove from water. To remove fluoride from the water supply, a large amount of filtration media is required to remove just a small amount of fluoride. Currently, it would require most of the room within the sport bottle for a filter to effectively remove fluoride. Until a more powerful filtration media is developed, it would not be possible to develop a fluoride reduction filter for the Sport Berkey. Fluoride reduction filters are available for the larger systems as there is more room to work with.