A container with a hermetic closure, the container including: a receptacle provided with a mouth including a receptacle opening, and an annular mouth surface surrounding said receptacle opening; a lid having a front side and a back side, the back side intended for being oriented towards the inside of the receptacle, said lid including an annular perimetral flange which, in a closed position, is superimposed on the annular mouth surface of the receptacle; a sealing ring arranged and held between the annular mouth surface of the receptacle and the lid; a closure mechanism unitarily movable between a closed position, in which the closure mechanism holds the lid against the annular mouth surface of the receptacle, and an open position, in which the closure mechanism releases the lid, allowing the opening thereof, the closure mechanism being formed by a shaped metal wire defining: a first region configured for being superimposed, when in the closed position, on the front side of the lid; a second region formed by two symmetrical opposite portions (42a, 42b) arranged on opposite sides of the mouth of the receptacle, each symmetrical opposite portion being connected to a different end of the first region and configured for being under elastic stress when in the closed position, attracting the first region to the mouth of the receptacle; at least a third region configured for being coupled, when in the closed position, to the receptacle in a position adjacent to the mouth of the receptacle and connected to the symmetrical opposite portions (42a, 42b) of the second region; the lid includes, at its back side, an annular centering rib of a smaller diameter than the mouth of the receptacle which, when the lid is in the closed position, is inserted into said mouth, and at its front side, a protruding annular closure rib characterized in that the annular centering rib includes an annular perimetral groove in which the sealing ring is fitted; the annular closure rib is completely or partially superimposed on the annular centering rib, said annular closure rib including at least two opposite supporting points in an area coinciding with or adjacent to the annular flange, and in that the first region of the closure mechanism is configured for being supported, in the closed position, on said at least two opposite supporting points. a receptacle provided with a mouth including a receptacle opening, and an annular mouth surface surrounding said receptacle opening; a lid having a front side and a back side, the back side intended for being oriented towards the inside of the receptacle, said lid including an annular perimetral flange which, in a closed position, is superimposed on the annular mouth surface of the receptacle; a sealing ring arranged and held between the annular mouth surface of the receptacle and the lid; a closure mechanism unitarily movable between a closed position, in which the closure mechanism holds the lid against the annular mouth surface of the receptacle, and an open position, in which the closure mechanism releases the lid, allowing the opening thereof, the closure mechanism being formed by a shaped metal wire defining: a first region configured for being superimposed, when in the closed position, on the front side of the lid; a second region formed by two symmetrical opposite portions (42a, 42b) arranged on opposite sides of the mouth of the receptacle, each symmetrical opposite portion being connected to a different end of the first region and configured for being under elastic stress when in the closed position, attracting the first region to the mouth of the receptacle; at least a third region configured for being coupled, when in the closed position, to the receptacle in a position adjacent to the mouth of the receptacle and connected to the symmetrical opposite portions (42a, 42b) of the second region; a first region configured for being superimposed, when in the closed position, on the front side of the lid; a second region formed by two symmetrical opposite portions (42a, 42b) arranged on opposite sides of the mouth of the receptacle, each symmetrical opposite portion being connected to a different end of the first region and configured for being under elastic stress when in the closed position, attracting the first region to the mouth of the receptacle; at least a third region configured for being coupled, when in the closed position, to the receptacle in a position adjacent to the mouth of the receptacle and connected to the symmetrical opposite portions (42a, 42b) of the second region; the lid includes, at its back side, an annular centering rib of a smaller diameter than the mouth of the receptacle which, when the lid is in the closed position, is inserted into said mouth, and at its front side, a protruding annular closure rib characterized in that the annular centering rib includes an annular perimetral groove in which the sealing ring is fitted; the annular closure rib is completely or partially superimposed on the annular centering rib, said annular closure rib including at least two opposite supporting points in an area coinciding with or adjacent to the annular flange, and in that the first region of the closure mechanism is configured for being supported, in the closed position, on said at least two opposite supporting points.