A supply container for a dispensing device for introducing a pourable detergent in metered amounts into a treatment chamber of a program-controlled cleaning appliance, the dispensing device including a rotatable carrier unit, the supply container being replaceably receivable in the carrier unit. The supply container includes: a reservoir chamber; a dispensing opening; a metering chamber connectable to the reservoir chamber via an interposed outlet opening; and a closure device configured to close the outlet opening at least until the supply container is first put into use. The closure device is configured to cooperate with an actuating device to open the outlet opening to provide a flow path of the detergent from the reservoir chamber into the treatment chamber of the appliance via the metering chamber and the dispensing opening.