A closure device with a first and a second closure part, which each include at least one connecting region, is provided. For closing the closure device, the first closure part is attachable to the second closure part along a connection axis and by rotation about the connection axis relative to the second closure part is movable into the closed position, wherein in the closed position the two closure parts are held at each other via their connecting regions. The connecting regions each include at least one sliding surface and at least one blocking surface such that the closure parts are rotatable along their sliding surfaces relative to each other about the connection axis into the closed position, when the two closure parts are pressed towards each other by external forces along the connection axis.
