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 . <EOS>