A thickened composition comprising a polymer, a divalent ions source, water and cement is disclosed. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The primary display is configured for displaying visual messages. At least one lip projects radially outwardly from the lower peripheral edge so that during operation of the rotor, solids traveling along the body portion are projected radially away from the rotor by the lip and become approximately aligned with the aperture so that gas flowing from the aperture creates bubbles in the slurry that entrain at least a portion of the solid particles.