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 (26A, 32A), the respective chamber volume being variable by the repositioning of said wall (26A, 32A), and g. the repositionable walls (26A, 32A) 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 (26A, 32A), the respective chamber volume being variable by the repositioning of said wall (26A, 32A), and g. the repositionable walls (26A, 32A) 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.