A transport or packaging container accommodating a plurality of supporting structures for closures, for transporting or packaging closures for closing cartridges for use in pharmaceutical, medical or cosmetic applications, in which the transport or packaging container is box-shaped and includes a bottom, which is closed or sealed by a seal, upstanding lower side-walls extending essentially perpendicularly from the bottom, a circumferential supporting step extending horizontally from the upstanding lower side-walls, upper side-walls extending upward from said circumferential supporting step, and a circumferential flange formed at upper ends of the upper side-walls; and the plurality of supporting structures for closures is accommodated inside the transport or packaging container.