A pump spray dispenser is provided with a squeezable container normally biased to an expanded condition and defining a gas discharge opening. A housing is connected to the container. In one embodiment of the dispenser, a mixing chamber is defined in a housing and communicates with the container. A cartridge holder is defined by the housing for receiving a cartridge that contains a fluid product and that has an openable seal. A fluid product transfer passage establishes communication between the mixing chamber and cartridge when the seal is opened. A spray dispensing orifice is defined in the housing for discharging a spray mixture of the fluid product and gas from the mixing chamber.