The present invention includes methods of stabilizing one or more sweet enhancers when they are exposed to a light source as well as liquid compositions containing one or more sweet enhancers and one or more photostabilizers. The carbon black pigment includes surface-modified carbon black, a diphenylmethane group that is bonded to the carbon black via a urethane bond through a functional group on the surface of the carbon black being bonded to a polysiloxane group. A rotatable member is received by the cavity and is rotatable about an axis. The control unit drives at least two antennas simultaneously so that a direction of magnetic field generated by one antenna is opposed to one generated by at least one other antenna adjacent to the one antenna. The leads each extend to the outside while being fixed to a pad formed of a conductive pattern.