A package is proposed, comprising a sleeve (2) of essentially parallelepipedal shape, and an insert ((3) which can be inserted into and withdrawn from the sleeve (2) in a sliding direction (S) through an opening (4) in the sleeve (2), the sleeve (2) comprising four longitudinal walls (2a, 2c) which are essentially parallel to the sliding direction (S). The package is characterized in that the sleeve is provided with a first stop tab (7) which extends from a first (2c) to a second (2a) of the longitudinal walls, the tab being at least partly separated from the first longitudinal wall (2c) and the second longitudinal wall (2a) in that the insert has a first locking edge (9a), the insert being prevented, upon contact of the first locking edge with the first stop tab (7a), from moving out of the sleeve, and in that the first locking edge (9a) can, by elastic deformation of a part of the insert (3) by means of maneuvering by a user, be moved so that its movement past the first stop tab (7a) is made possible.