Lance and containers with Codiergeometrie

There is proposed a cleaning device (110) for cleaning of cleaning stock (114) which is adapted to pressurize the cleaning stock (114) with at least one cleaning fluid (124). The cleaning device (110) has at least one suction lance (136) for extracting at least one auxiliary (132) from at least one of the suction lance (136) associated with the exchangeable reservoir (134). The lance (136) has at least a mechanical coding element (152) with a deviating from a circular cross-section cross-section. The mechanical coding element (152) is adapted to be inserted with the lance (136) into the container (134). The mechanical coding element (152) requires to be inserted into the container (134), a mechanically coded aperture (158) with an appropriate, deviating from a circular cross-section cross-section.