A pouring device for filling or discharging of a liquid comprising: an elongated body (9), a closure sleeve (4), which is arranged co-axially with respect to the device body (9) and is mounted axially on the main sleeve (1), wherein the main sleeve (1) is slidable relative to the closure sleeve (4) and the body (9) and it comprises an outlet end on its side remote from the body (9) and an inlet end on the side directed to the body (9), facing towards the liquid inlet, wherein at the side of this end the main sleeve (1) has on its side surface at least one, and preferably, at least two outflow openings (la) or more outflow openings, while a member (2) for activating and shutting off the liquid outflow from the device is located at the outflow end of the device, being characterized in that the member (2) for activating the flow has a form of a push-button (2), located on the main sleeve (1) at its outlet end side, which said push-button (2) is non-rotatably mounted thereon, and between the main sleeve (1) and the closure sleeve (4) the sealing, preferably in the form of a rolling diaphragm (3), as well as the helical spring (5) of the push-button (2) are arranged, the device is transposed to the open flow position by exerting pressure on the pushing member (2) applied in the axial direction and the axial displacement of the push-button member (2).
