A combination of a lip activated closure and a drinking vessel, wherein the closure comprises: - a tubular base body with an entrance opening for liquid at the lower end and an exit opening for liquid at the upper end, - a projection protruding radially inward between the lower end and the upper end from the inside of the base body, the projection extending over the inner circumference of the base body with a seating surface on the topside and a first sealing surface on the underside, - a tubular closure body, which comprises - at a distance from its upper end a closure wall blocking its cross section, - a revolving annular disk protruding radially outward at its lower end having a second sealing surface on the topside and - at least one spring element protruding radially outward between its upper end and the annular disk, which supports itself at different places in circumferential direction prestressed at the seating surface, so that the second sealing surface fits tightly on the first sealing surface, - a plurality of passage channels spaced apart from one another in circumferential direction radially extended between the spring element and the seating surface, - a first annular gap extended upward in axial direction to the inner ends of the passage channels between the base body and the closure body and - a second annular gap extended upward in axial direction from the outer ends of the passage channels between the base body and the closure body, characterized in that - a first sealing lip extending in circumferential direction protrudes downward from the first sealing surface for sealing at the inside of the mouth of a drinking vessel. - a tubular base body with an entrance opening for liquid at the lower end and an exit opening for liquid at the upper end, - a projection protruding radially inward between the lower end and the upper end from the inside of the base body, the projection extending over the inner circumference of the base body with a seating surface on the topside and a first sealing surface on the underside, - a tubular closure body, which comprises - at a distance from its upper end a closure wall blocking its cross section, - a revolving annular disk protruding radially outward at its lower end having a second sealing surface on the topside and - at least one spring element protruding radially outward between its upper end and the annular disk, which supports itself at different places in circumferential direction prestressed at the seating surface, so that the second sealing surface fits tightly on the first sealing surface, - a plurality of passage channels spaced apart from one another in circumferential direction radially extended between the spring element and the seating surface, - a first annular gap extended upward in axial direction to the inner ends of the passage channels between the base body and the closure body and - a second annular gap extended upward in axial direction from the outer ends of the passage channels between the base body and the closure body, characterized in that - a first sealing lip extending in circumferential direction protrudes downward from the first sealing surface for sealing at the inside of the mouth of a drinking vessel.