A lid (100, 200, 300, 400, 500, 600) for a drinking vessel, said lid including a body (102, 202, 302, 402, 502) with at least one spout (104, 204, 304, 404, 504, 604) allowing air or liquid to pass through, wherein said body includes a first wall (104a, 204a, 304a) and a second wall (104b, 204b, 304b) which are opposite to each other, and at least a first valve (110, 210, 310, 410, 510, 610) in said spout wherein said first valve includes at least an upper valve membrane (110a, 210a, 310a, 410a, 510a, 610a) and a lower valve membrane (110b, 210b, 310b, 410b, 510b, 610b), wherein said upper valve membrane is integrally formed with said first and second walls, wherein said lower valve membrane is integrally formed with said first and second walls, wherein each of said upper and lower valve membranes includes respectively an upper surface (111a, 111c) and a lower surface (111b, 111d) which are opposite to each other, wherein said upper surfaces of said upper and and lower valve membranes face generally a first direction, wherein said lower surfaces of said upper and lower valve membranes face generally a second direction which is opposite to said first direction, wherein said upper valve membrane is deformable between a first configuration in which at least part of said lower surface of said upper valve membrane contacts and overlaps at least part of said upper surface of said lower valve membrane to prevent flow of air or liquid through said first valve and a second configuration in which said upper valve membrane is out of contact with said lower valve membrane to allow flow of air or liquid through said first valve, and wherein said upper valve membrane and said lower valve membrane span across a space between said first wall and said second wall, characterized in that when said upper valve membrane and said lower valve membrane are in said second configuration, said first valve is adapted to force a liquid to pass through said first valve through a path at least part of which is perpendicular or at least inclined to the length of said spout wherein said body includes a first wall (104a, 204a, 304a) and a second wall (104b, 204b, 304b) which are opposite to each other, and at least a first valve (110, 210, 310, 410, 510, 610) in said spout wherein said first valve includes at least an upper valve membrane (110a, 210a, 310a, 410a, 510a, 610a) and a lower valve membrane (110b, 210b, 310b, 410b, 510b, 610b), wherein said upper valve membrane is integrally formed with said first and second walls, wherein said lower valve membrane is integrally formed with said first and second walls, wherein each of said upper and lower valve membranes includes respectively an upper surface (111a, 111c) and a lower surface (111b, 111d) which are opposite to each other, wherein said upper surfaces of said upper and and lower valve membranes face generally a first direction, wherein said lower surfaces of said upper and lower valve membranes face generally a second direction which is opposite to said first direction, wherein said upper valve membrane is deformable between a first configuration in which at least part of said lower surface of said upper valve membrane contacts and overlaps at least part of said upper surface of said lower valve membrane to prevent flow of air or liquid through said first valve and a second configuration in which said upper valve membrane is out of contact with said lower valve membrane to allow flow of air or liquid through said first valve, and wherein said upper valve membrane and said lower valve membrane span across a space between said first wall and said second wall, characterized in that when said upper valve membrane and said lower valve membrane are in said second configuration, said first valve is adapted to force a liquid to pass through said first valve through a path at least part of which is perpendicular or at least inclined to the length of said spout