The disclosure refers to a lid in the form of a building block, including a side wall, top surface with an internal wall and an external wall, the base of the lid, one or more male pins and one or more female openings, with their longitudinal axes placed in a direction that is essentially parallel to the internal section of the side wall provided with a lid fixing element to the package to be closed, in which one or more male pins have an external diameter of (4.8±0.1) millimeters, of (6.5±0.1) millimeters, or of (9.4±0.2) millimeters, and one or more female openings which have an internal diameter of (4.8±0.1) millimeters, of (6.5±0.1) millimeters or of (9.4±0.2) millimeters.