A closure system for a beverage container, particularly a beverage can, comprising - a lid, wherein the lid comprises an upper side, a lower side, a drinking orifice and a guide slot which extends along a first axis extending substantially parallel to the upper side of the lid; - a closure member for closing the drinking orifice, and - an operating member for manually opening the drinking orifice by a user, wherein - the closure member is positioned at the lower side of the lid and connected with the operating member at the upper side of the lid; - the closure member for closing the drinking orifice is configured to cover the entire surface of the drinking orifice in a closed position; and - the operating member and the closure member are disposed movably along the first axis, wherein ▪ moving of the operating member into a first direction along the first axis causes movement of the closure member from the closed position and opening of the drinking orifice, and ▪ moving of the operating member into a second direction opposite the first direction along the first axis causes movement of the closure member into the closed position and reclosure of the drinking orifice; and - the operating member and/or the closure member comprises a guide member engaging the guide slot so that the operating member is movable along the first axis only; characterized in that - the closure member is fixedly connected with the operating member at the upper side of the lid; and - the drinking orifice comprises the guide slot. - a lid, wherein the lid comprises an upper side, a lower side, a drinking orifice and a guide slot which extends along a first axis extending substantially parallel to the upper side of the lid; - a closure member for closing the drinking orifice, and - an operating member for manually opening the drinking orifice by a user, - the closure member is positioned at the lower side of the lid and connected with the operating member at the upper side of the lid; - the closure member for closing the drinking orifice is configured to cover the entire surface of the drinking orifice in a closed position; and - the operating member and the closure member are disposed movably along the first axis, wherein ▪ moving of the operating member into a first direction along the first axis causes movement of the closure member from the closed position and opening of the drinking orifice, and ▪ moving of the operating member into a second direction opposite the first direction along the first axis causes movement of the closure member into the closed position and reclosure of the drinking orifice; and ▪ moving of the operating member into a first direction along the first axis causes movement of the closure member from the closed position and opening of the drinking orifice, and ▪ moving of the operating member into a second direction opposite the first direction along the first axis causes movement of the closure member into the closed position and reclosure of the drinking orifice; and - the operating member and/or the closure member comprises a guide member engaging the guide slot so that the operating member is movable along the first axis only; - the closure member is fixedly connected with the operating member at the upper side of the lid; and - the drinking orifice comprises the guide slot.