An apparatus comprising a container handling device comprising a centering device having a standing surface and a container gripper having a head side, a foot side, inspection openings on both said head side and said foot side, light-conducting elements, and a gripper bell having an inner area, a light source arranged to couple light into said light-conducting elements, a detection-and-control system comprising an optical system, and wherein said inner area can be illuminated by emerging light so that a cover side arranged at said foot side can be inspected by said optical system through said container gripper and by said light-conducting elements.