Abstract: A liquid dosing device for use with a liquid dispenser that includes a container for holding liquid in communication with a dispenser base, an outlet port for dispensing the liquid. The liquid dosing device includes a valve housing, a reservoir and a dosing cup. The valve housing is mounted to the dispenser base and includes an open top, an outlet port and a blocking region. The reservoir is mounted within the valve housing and includes at least one inlet port in communication with the dispenser base outlet port and at least one outlet port. The dosing cup is movably mounted within the valve housing in fluid communication with the reservoir and includes at least one inlet port in fluid communication with the reservoir outlet port, a blocking region, at least one outlet port and mechanism for moving the dosing cup between a fill position and a dose position to prevent spillage of the liquid being dispensed, or to dispense the liquid in defined quantities.