A mechanism for opening and reclosing the outflow opening for emptying a container, incorporating a latch featuring the means to initiate movement of the latch, with the latch connected rotationally to the lid featuring the outflow opening for emptying the container, characterised in that formed on the bottom surface of the lid is at least one guide with an arched guiding surface going down in a screw-like manner with respect to the bottom surface of the lid, and the latch features at least one hatch with an arched surface shaped on the bottom surface of the latch, where the said arched surface goes down in a screw-like manner with respect to the top surface of the latch, and where the hatch is fitted slidingly on the said guide, so that the arched surface of the latch contacts the arched guiding surface of the guide.