The “Binchotan-carbon” on the inner surface of the pot is coated with Diamond Fluorine.
By making the boiling time longer, it alkalizes the ph level of hot water, which enables
you to extract more “tasty elements” of tea, such as amino acid and cathechin. You can
enjoy healthier tea. Also, it keeps the alkalized hot water at the same ph level, when the
pot is in “keep warm” mode.