water entrains the colored liquid from the first pool therewith into the toilet, spilling over the basin wall. A last portion of the flushing water is retained in the basin below the basin wall and is gradually drained from the dispenser through the bottom opening, dropping clear from the wall of the toiled bowl. A second pool of diluted color liquid is formed in the low portion of the basin bottom ready to be entrained with the flow of flushing water in a next flushing operation. This process is repeated until the container is empty.
The liquid rim dispenser preferably comprises two bottom openings disposed in a line generally parallel to the rim of the toilet bowl. The openings are preferably formed as drainage tubes extended beneath the bottomof the basin and curved so as to convey the dropping last portion of the flushing water farther from the wall of the toilet bowl. The drainage tubes may be also elevated above the bottom of the basin, thereby defining the low portion of the basin bottom.
The cup bottom is preferably elevated from the basin bottom, at least about the level of the drainage tubes"" inlets.
The wall of the basin and the wall of the cup are preferably complemented with a plurality of baffles and openings or slits therebetween so as to restrain the flow of flushing water and delay the entraining of the colored liquid into the toilet bowl.
In a preferred embodiment of the present invention, the liquid rim dispenser consists of a holder including said basin