A gantry tower spraying system (200) with a cartridge (10) / receptacle (100) assembly includes a gantry and a spray assembly coupled to the gantry to allow for translational movement of the spray assembly along the gantry. The spray assembly includes a receptacle (100) for receiving a cartridge (10) containing a cosmetic liquid for skin treatment, and a spray nozzle (134) coupled to the receptacle (100) for receiving the cosmetic liquid and dispensing the cosmetic liquid in a spray. The receptacle (100) has an inner surface of a size and shape to generally conform to a size and shape of a portion of an outer io surface of the cartridge (10). The spraying system (200) can further be provided with an oscillation mechanism adapted to cause oscillation of the spray nozzle (134). The bottle (10) can be provided with a keying mechanism (50) for engaging a corresponding key structure (106) of the receptacle (100).