Transport unit and packaging structure for transporting and storing a plurality of containers for substances for pharmaceutical, medical or cosmetic uses

A transport unit for a packaging structure for a plurality of containers for substances for pharmaceutical, medical or cosmetic uses includes a tray with a plurality of seats for positioning the containers and a planar inlay part for covering the containers positioned in the seats of the tray. The inlay part is configured to cover the containers positioned in the seats and at the same time to be received completely in the tray, without protruding above an upper edge of the tray. A plurality of depressions corresponding to the seats of the tray are formed in the inlay part, in order to position the containers at their two ends lying opposite each other. A gap is formed at least partially between the inlay part, received in the tray, and side walls of the tray.