A reclosable cartridge assembly for use in an aerosol-generating system, the cartridge assembly comprising: a cartridge extending along a longitudinal axis and having at least a first compartment comprised between a cartridge upstream end wall and a cartridge downstream end wall; and a housing comprising at least one rotatable portion, the rotatable portion having an end wall (50, 52) comprising at least one opening, the rotatable portion being rotatably fitted to the cartridge and configured to rotate relative to the cartridge about the longitudinal axis; wherein: the rotatable portion is adapted to rotate relative to the cartridge between a storage position and a dispensing position and between the dispensing position and the storage position; at least one of the cartridge upstream end wall and the cartridge downstream end wall comprises at least one rupturable portion (38, 40); the rotatable portion is adapted to rupture the rupturable portion (38, 40) to expose an opening (42, 44) in the end wall of the cartridge when the rotatable portion is rotated from the storage position to the dispensing position for the first time; the opening (43, 46) in the end wall (50, 52) of the rotatable portion is aligned with the opening in the end wall of the cartridge when the rotatable portion is in the dispensing position; and the opening (42, 44) in the end wall of the cartridge is covered by the end wall (50, 52) of the rotatable portion when the rotatable portion is rotated from the dispensing position to the storage position. a cartridge extending along a longitudinal axis and having at least a first compartment comprised between a cartridge upstream end wall and a cartridge downstream end wall; and a housing comprising at least one rotatable portion, the rotatable portion having an end wall (50, 52) comprising at least one opening, the rotatable portion being rotatably fitted to the cartridge and configured to rotate relative to the cartridge about the longitudinal axis; wherein: the rotatable portion is adapted to rotate relative to the cartridge between a storage position and a dispensing position and between the dispensing position and the storage position; at least one of the cartridge upstream end wall and the cartridge downstream end wall comprises at least one rupturable portion (38, 40); the rotatable portion is adapted to rupture the rupturable portion (38, 40) to expose an opening (42, 44) in the end wall of the cartridge when the rotatable portion is rotated from the storage position to the dispensing position for the first time; the opening (43, 46) in the end wall (50, 52) of the rotatable portion is aligned with the opening in the end wall of the cartridge when the rotatable portion is in the dispensing position; and the opening (42, 44) in the end wall of the cartridge is covered by the end wall (50, 52) of the rotatable portion when the rotatable portion is rotated from the dispensing position to the storage position. the rotatable portion is adapted to rotate relative to the cartridge between a storage position and a dispensing position and between the dispensing position and the storage position; at least one of the cartridge upstream end wall and the cartridge downstream end wall comprises at least one rupturable portion (38, 40); the rotatable portion is adapted to rupture the rupturable portion (38, 40) to expose an opening (42, 44) in the end wall of the cartridge when the rotatable portion is rotated from the storage position to the dispensing position for the first time; the opening (43, 46) in the end wall (50, 52) of the rotatable portion is aligned with the opening in the end wall of the cartridge when the rotatable portion is in the dispensing position; and the opening (42, 44) in the end wall of the cartridge is covered by the end wall (50, 52) of the rotatable portion when the rotatable portion is rotated from the dispensing position to the storage position.