Abstract: A dispenser (50) for flavoring concentrate is adapted to be attached to an open mouthed beverage vessel (10). The dispenser (60) comprises a reservoir (51), a manually operable pump (52) and a storage chamber (60). The reservoir is arranged to contain concentrate, and the pump is coupled to the reservoir to dispense a measured quantity of concentrate to the storage chamber. The dispenser is adapted to be secured across the mouth of the vessel so that tilting of the vessel ensures escape of the concentrate from the storage chamber prior to escape of the beverage within the vessel.