An aerosol dispenser, outer container for an aerosol dispenser and a preform for an outer container, each having an open neck at the top and a closed end bottom longitudinally spaced therefrom. The aerosol dispenser has, in order, from the top of the neck, a valve attachment, an annular first surface and an annular second surface, each having a respective diameter. The diameter of the valve attachment is greater than the diameter of the first surface, which, in turn, is greater than the diameter of the second surface. This geometry allows any complimentary product delivery to be disposed on the second surface. Any suitable and complimentary valve may be attached to the valve attachment and sealed to the first surface. This arrangement provides flexibility and the capability to easily mix and match any desired combination of fittingly suitable outer containers, product delivery devices and valves. Suitable product delivery devices include bags, and dip tubes.