A packaging comprising, on the one hand, a plastic container having lateral walls (20, 21, 22, 23) meeting at corners, a top opening and a bottom, and on the other hand, a removable plastic lid that is configured to cover the top opening in the container, and wherein the container is provided, at its top opening, with a first engagement portion bearing a first outward-directed rim that extends around the periphery, the lid being provided, on its peripheral part, with a second engagement portion that is folded downward and has an inward-directed rim which is able to latch underneath the first outward-directed rim of the container, and wherein the second engagement portion of the lid has a skirt extending over the lower part of the second engagement portion, and wherein the first outward-directed rim of the container, on the one hand, and the inward-directed rim of the lid, on the other hand, having curved corner sections (29, 43) in the corners where said lateral walls meet, said curved corner sections connecting the lateral sections of the respective rims, where at least one of the curved corner sections of the inward-directed rim is provided with a foldable skirt section, articulated in a folding area at the upper part of the second engagement portion which is able to be folded from an engagement position to an outward-directed position in such a way that a central part of said at least one corner section of the inward-directed rim is separated by a levering effect of the first outward-directed rim of the top opening, and that the engagement between the first outward-directed rim and the inward-directed rim of the lid is thus weakened over the central part, and wherein said foldable skirt section is separated from the remaining skirt section by means of two grooves formed in the external surface of the skirt and extending downward from a folding area to the lower edge of the skirt, said grooves reducing the wall thickness of the skirt such that the skirt can be broken along the grooves in order to fold the foldable skirt section, from the engagement position thereof, into the outward-directed position thereof characterized in that the container comprises, at the foldable skirt section of the lid, a reception portion forming a shield for the free end of the foldable skirt section, with a receptacle receiving said free end in the engagement position of the foldable skirt section, said reception portion being configured to prevent the folding of said foldable skirt section to said outward-directed position, and wherein said reception portion is configured to be deformed in order to release the free end and authorize the pivoting of the foldable skirt section from the engagement position to said outward-directed position and wherein the receptacle comprises a front wall, extending to overlap, in front of the free end of the foldable skirt section in the engagement position of the foldable skirt section, said front wall then constituting an abutment preventing the folding of said foldable skirt section to said outward-directed position, and wherein said front wall is configured to be deformed by an operator to a retracted position enabling the free end to be released and authorizing the pivoting of the foldable skirt section around the folding area from the engagement position to the outward-directed position, and wherein the free end of the foldable skirt section has a curved profile, along a plane parallel to the lid, and wherein the receptacle of the reception portion has, in length, a curved trajectory receiving the curved profile of the free end and wherein the front wall comprises longitudinal ends and is secured at its longitudinal ends by material bridges in the form of vertical ribs connecting respectively the longitudinal ends of the front wall and the lateral walls or corner of the container, and wherein a groove reducing the thickness of the front wall is provided at one of the longitudinal ends of the front wall, configured in such a way as to break by dissociating the longitudinal end of the material bridge when the front wall is deformed to the retracted position.