of the second wall 37 to the edge 34 a allows to close the tray 34 so as to make it suitable to dispense the liquid once it is coupled to the container 30 the outlet 44 is placed as shown in fig8 at an indentation 46 formed on the first wall 36 the indentation 46 forms diffusion grooves 47 preferably facing upwards which extend in a radial pattern or web from the central area of the first wall 36 in this embodiment the outlet 44 is at the center of the web in order to allow a uniform diffusion of the liquid flowing from inside the container the dispenser 1 is provided with a hanger 45 associated with the container 30 for allowing the vertical positioning of said container in the toilet bowl in such a way that the diffusion grooves 47 face upwards to the hanger 45 a hook 46 is connected which interlockingly engages the rim of the toilet bowl finally the positioning of the dispenser 1 inside the toilet bowl is eased by the tearing strips 42 which by being removed properly allow to adjust the distance between the tray 34 and the wall of the toilet bowl finally other embodiments could be devised for the tray 34 and the outlet 44 in addition to what is already disclosed above with reference to fig4 to 6 it.