When you smoke a hookah, the airflow created by your inhalation causes sparks and charcoal dust to fall into the vase of your hookah. Over time, the swirling water causes a carbon deposit on the walls of the vase. A mark then forms at the water level.
This mark is not only aesthetically displeasing but also a real nuisance that can rot and emit unpleasant odors and a strange taste if not cleaned. The 30 cm vase brush will help you clean the inside of your vase and remove all the carbon deposits by friction... an accessory to be used without moderation!