The system comprises a pack having three walls made of card or a like material, hinge-connected two-by-two according to fold lines (L1, L2) in end sides of the walls, and a replacement cartridge (40). The pack comprises a flat pouch (T) formed by a first wall (10) and by a second wall (20), which are superposed and fixed to one another in a substantially planar structure, where the first wall (10) has at least a first opening (15). The replacement cartridge (40) is arranged removably in the pouch (T), at least partly exposed in the first opening (19). The second wall (20) has a second opening (25) which at least partly exposes a rear face of the replacement cartridge (40). The third wall (30) is foldable with respect to the pouch (T): in a first configuration in which it is laid on the pouch (T) in a substantially planar state, in which the replacement cartridge (40) cannot be removed from the pouch； and in a second configuration in which the third wall (30) is rotated distant from the pouch (T) in a state that enables a user to remove the replacement cartridge (40) from the pouch (T)； at least a wing (35) being provided on the second wall (20) or on the third wall (30), which wing (35) is hinge-connected to the wall (20, 30) foldably about a respective vertical fold edge (36), where the wing (35) supports the pouch (T) in a stable erect position as a display frame, when, the third wall (30) being in the first configuration, the wing (35) is folded substantially by a right angle with respect to the pouch (T).
