water reference is now made to fig1 to 5 in which a first embodiment of the invention is illustrated with particular reference to a second embodiment of fig6 to 8 b in describing the differences with respect to the first embodiment dispenser 1 comprises an inverted container 3 in which a volume of dispensable liquid is stored container 3 comprises a downwardly directed discharge spout 5 positioned on container 3 below the dispensable liquid level such as illustrated by level 7 within container 3 u2014 which may vary from the top to the bottom of container 3 as more liquid is consumed therefrom discharge spout 5 must also be located below the water level in the tank during quiescent periods intermediate flush cycles such as represented by level 9 u2014 which may vary from well over the top to the bottom of container 3 depending on its position within the cistern the dispensable liquid in container 3 is maintained in an isolated condition from the cistern water surrounding the dispenser regardless of the depth to which the dispenser is immersed in the cistern water by the airlock created as will be appreciated by those skilled in the art the air above level 7 prevents gravitational flow of the dispensable liquid from container 3 as long as discharge spout 5 is.