A container handling plant and a method for a container handling plant are shown. The container handling plant comprises at least one container handling machine for handling containers, wherein at least one container handling machine comprises a type preselection memory in which different types are preselectable for a handling to be performed by the container handling machine, at least one output device positioned at the at least one container handling machine for outputting an audio signal and/or an optical signal, and a control device configured to control the at least one output device such that the output device acoustically outputs a predetermined audio signal made of tone sequences comprising at least two different tones and/or optically outputs an optical signal, if due to the type preselected in the type preselection memory a change of a type or a refilling for the preselected type at the container handling machine is scheduled in the future at the end of a predetermined time period.