cover 29 a seal 32 can be molded on or secured an alternative float 33 is represented in fig1 this has the configuration of a cone whose tip is guided through opening 31 into the pot 17 and can at least partially dip into the urine 35 in both embodiments fig1 and 12 the float 33 is elevated from the urine accumulating above the cover 29 so that the latter can reach the container 25 through the gap thereby arising along the float in a further advantageous embodiment of the invention according to fig1 the float 33 is configured frustum shaped and has on its upper end an asymmetrically arranged plate 34 which when the urine level rises causes the float 33 to be elevated on one side whereby a gap arises not running parallel along opening 31 and thus makes possible a ventilation of the space lying below during the outflow of the urine on the jacket of the float 33 grooves 65 can be provided in addition which after the elevation of the float 33 above the opening cross section in the cover 29 project out and facilitate the outflow illustrated only in fig1 preferably in all embodiments a protective screen or lattice 63 can lie over the cover 29 which bridges over the.