Abstract: The invention relates to a flow control device (1) for a container (20) for fluids, wherein the flow control device is attachable to an opening of the container for fluids. The flow control device comprises a top cover section (2) with an outflow orifice (7), wherein a connection is formed between the container and the outflow orifice. The device is provided with a valve retaining element (5) with a through-flow orifice (8), and a movable valve (4) for alternately opening and closing the through-flow orifice. The flow control device comprises an actuator element (3), which is arranged to open the valve. A first chamber (11) and a second chamber (12) are formed in the flow control device, which are separated from one another by means of the actuator element. The actuator element is made to move in an upstream direction by an underpressure in the second chamber for bringing the valve into an opened position.