A fire retardant intumescent coating composition is disclosed, which includes expandable graphite, an aromatic polyamine resin, and a phosphorous-containing compound. A first focal point of the first focal length of the lens is so selected that the emitted high frequency signals of the antenna hit the lens within the lens aperture and that a second focal point of the second focal length lies in an opening region of the containment having an opening diameter that is smaller than the diameter of the lens aperture. The water separated from the oil is pumped by a high pressure pump through a helical coil that is heated to a high temperature by the burner. One or more advertisements in the form of data, audio, video, or image file or a combination thereof is paired to one or more contact information contained in the \u2018central contact information database\u2019. Rinse liquid is then allowed to contact the cleansing block such that an amount of the cleansing block is mixed with rinse fluid to clean the surface or a liquid reservoir adjacent the surface.