Packaging comprising: an element made of semi-rigid material, such as cardboard or corrugated cardboard, comprising a bottom part and at least two walls (4, 5) that stand upright with respect to the bottom part, the bottom part and the at least two walls defining an internal space for receiving content, and a first self-sealing sheet element and a second self-sealing sheet element, each self-sealing sheet element comprising a sheet of paper covered with self-sealing composition on only one face, wherein the self-sealing sheet elements are fixed to the element made of semi-rigid material so as to be able to pass from a position in which they are superposed with two respective walls, in order for the content to be placed in the internal space of the packaging, to a position folded over the content, the packaging is designed such that, when the self-sealing sheet elements are in the superposed position, the first self-sealing sheet element has its face that is covered with self-sealing composition facing the wall corresponding to this sheet element and the second self-sealing sheet element has its face that is covered with self-sealing composition facing the internal space, such that, when the first self-sealing sheet element and then the second self-sealing sheet element are subsequently positioned in the position folded over the content, thereby defining an overlapping region of said self-sealing sheet elements, those two faces of said self-sealing sheet elements that are covered with self-sealing composition face one another in the parts of these sheet elements that correspond to the overlapping region. an element made of semi-rigid material, such as cardboard or corrugated cardboard, comprising a bottom part and at least two walls (4, 5) that stand upright with respect to the bottom part, the bottom part and the at least two walls defining an internal space for receiving content, and a first self-sealing sheet element and a second self-sealing sheet element, each self-sealing sheet element comprising a sheet of paper covered with self-sealing composition on only one face, wherein the self-sealing sheet elements are fixed to the element made of semi-rigid material so as to be able to pass from a position in which they are superposed with two respective walls, in order for the content to be placed in the internal space of the packaging, to a position folded over the content, the packaging is designed such that, when the self-sealing sheet elements are in the superposed position, the first self-sealing sheet element has its face that is covered with self-sealing composition facing the wall corresponding to this sheet element and the second self-sealing sheet element has its face that is covered with self-sealing composition facing the internal space, such that, when the first self-sealing sheet element and then the second self-sealing sheet element are subsequently positioned in the position folded over the content, thereby defining an overlapping region of said self-sealing sheet elements, those two faces of said self-sealing sheet elements that are covered with self-sealing composition face one another in the parts of these sheet elements that correspond to the overlapping region.