Dispenser for discharging liquids, having the following features: a. the dispenser includes a liquid reservoir for storing the liquid prior to discharging, and b. the dispenser includes a discharge opening through which the liquid can be dispensed into an environment, c. the dispenser includes a metering installation for discharging a defined liquid quantity as a reaction to an activation of the dispenser , wherein the metering installation at the entry side is connected to the liquid reservoir and at the exit side is connected to the discharge opening , and d. the metering installation includes a pre-metering chamber which by way of an infeed duct is connected to the liquid reservoir , and e. the metering installation includes a main metering chamber which by way of an intermediate duct is connected to the pre-metering chamber and by way of a discharge duct is connected to the discharge opening , and f. the pre-metering chamber and the main metering chamber each have a repositionable wall , the respective chamber volume being variable by the repositioning of said wall , and g. the repositionable walls of the pre-metering chamber and of the main metering chamber are operatively coupled in such a manner that a volumetric enlargement of the pre-metering chamber causes a volumetric reduction of the main metering chamber , and h. an infeed valve which in the closed state prevents and in the opened state enables the inflow of liquid from the liquid reservoir into the pre-metering chamber is provided in the infeed duct , characterized by the following feature: i. an intermediate valve which in the closed state prevents and in the opened state enables the inflow of liquid from the pre-metering chamber into the main metering chamber is provided in the intermediate duct . a. the dispenser includes a liquid reservoir for storing the liquid prior to discharging, and b. the dispenser includes a discharge opening through which the liquid can be dispensed into an environment, c. the dispenser includes a metering installation for discharging a defined liquid quantity as a reaction to an activation of the dispenser , wherein the metering installation at the entry side is connected to the liquid reservoir and at the exit side is connected to the discharge opening , and d. the metering installation includes a pre-metering chamber which by way of an infeed duct is connected to the liquid reservoir , and e. the metering installation includes a main metering chamber which by way of an intermediate duct is connected to the pre-metering chamber and by way of a discharge duct is connected to the discharge opening , and f. the pre-metering chamber and the main metering chamber each have a repositionable wall , the respective chamber volume being variable by the repositioning of said wall , and g. the repositionable walls of the pre-metering chamber and of the main metering chamber are operatively coupled in such a manner that a volumetric enlargement of the pre-metering chamber causes a volumetric reduction of the main metering chamber , and h. an infeed valve which in the closed state prevents and in the opened state enables the inflow of liquid from the liquid reservoir into the pre-metering chamber is provided in the infeed duct , characterized by the following feature: i. an intermediate valve which in the closed state prevents and in the opened state enables the inflow of liquid from the pre-metering chamber into the main metering chamber is provided in the intermediate duct . <EOS>