Aqueous liquid having an oxygen demand flows into a treatment vessel where it is treated by suspended aerobic bacterial solids in the presence of dissolved oxygen. The indication area comprises a magnetic solution distributed in a cured medium. The present invention provides control on the client with the implementation of a client pull data transport model. The device further includes a mechanism for removably displaying the cosmetic items on an interior face of the protective flap, and a mechanism for illuminating the storage chamber and the protective flap so that the cosmetic items are illuminated while displayed on the interior face of the protective flap. The invention relates furthermore to moulded articles which are produced with this moulding compound and the use thereof.