Abstract: A hollow handle (1), which is connected at one end to a water hose (2), and which is connectable at the other end to a fluidic cleaning and/or massaging device, especially a mouth cleansing shower, a face cleaning brush or a denture cleaning device, comprises a dosing space (40) or takes up a separate dosing container (9, 25, 29). An effective substance is located in the dosing space or in the insertable dosing container. The dosing space or the dosing container is provided with a device (11, 27, 35, 36, 42) for dispensing a small, especially an adjustable quantity of the effective substance into the water stream guided through the hollow handle. The effective substance may be solid or liquid. Solid effective substances which are hard to dissolve are preferably shaped as rods which are insertable into a respectively adapted elongated dosing container (9), which is provided with a certain number of holes (14, 14') corresponding to the quantity of the effective substance selected to be dissolved.

Abstract: An adapter for connection to a liquid faucet comprises an inlet member, a coaxial outlet member, and a valve device which is rotatable relative to the outlet member about an axis common to the inlet and outlet members. The inlet member is connectable to the outlet end of the liquid faucet. The outlet member has several outlet openings or groups of outlet openings separated from each other. The valve device is rotated in order to continuously adjust the opening ratio between the various outlet openings of the outlet member relative to each other, thereby providing a precisely regulated amount of liquid which is branched off from the liquid faucet for operating auxiliary devices such as a douche.