Device in packaging

A device at a package which in its erected state comprises a bottom (2) and hollow walls (3-6) protruding upwards therefrom, which walls each has an internal (12-15) and an external (16-19) wall portion located at a mutual distance while forming a cavity therebetween, and panel portions (20-23), which form upper edges of the walls of the package and which connect the internal and external wall portions to each other, said package being made of a foldable blank having a bottom portion (7), wall assemblies (8-11) protruding therefrom and comprising the internal (12-15) and external (16-19) wall portions and the panel portions (20-23), and an arrangement for locking the package in its erected state, which arrangement comprises one or more locking tips (25, 26, 32, 33), said wall assemblies (8-11) of the blank having flaps (24, 27, 31, 34) at their ends turned away from the bottom portion (7), said package being erected by pivoting the wall assemblies of the blank inwards toward the middle of the package so that the walls are formed and the flaps bear upon the upper side of the bottom portion (7) in the erected state of the package and are located below the panel portions (20-23), characterized in that at a corner formed by two adjoining walls (3-6) extending in an angle toward each other, a locking tip (25, 26, 32, 33) is connected with the internal wall portion (12-15) of a first of the walls by means of a folding line, which locking tip protrudes into the cavity of the other of the walls in the corner and which is arranged to lock the first wall in place by bearing against the inner side of the panel portion (21, 23) of the other wall at a position adjacent to a folding line between the panel portion and the external wall portion (17, 19) associated thereto.