There is provided a cartridge assembly for an aerosol-generating system, the cartridge assembly including a cartridge, a cartridge cover, and a mouthpiece. The cartridge includes at least one compartment having an air inlet and an air outlet. The cartridge cover is helicoidally moveable with respect to the cartridge between a first position in which the air inlet is obstructed and a second position in which air may flow through the air inlet. The mouthpiece is helicoidally moveable with respect to the cartridge between a third position in which the air outlet is obstructed and a fourth position in which air may flow through the air outlet.
