The invention refers to a system comprising disposable medical devices and a packaging strip (1) comprising a plurality of chambers (2) containing the disposable medical devices, the strip being folded along breadthwise running fold lines to form a series of loops, each loop comprising opposing sections (3, 4), the opposing sections of at least some of these loops being sealed to each other thus forming chambers (2) between said sections. The invention also refers to a cartridge (10) containing such a packaging strip.