Chassis for aerosol dispenser aerosol dispenser having a chassis and preform chassis for an aerosol dispenser

An outer container having a longitudinal axis and being usable for a pressurized aerosol dispenser, the outer container is polymeric and it comprises:

• a closed end bottom and an open neck longitudinally opposed thereto, the open neck comprising:
• a first surface, which is polymeric, having a first surface diameter wherein the first surface forms a funnel shape, the funnel shape sloping downwardly towards the longitudinal axis;
• a second surface, which is polymeric, disposed interior to the first surface and having a second surface diameter less than the first surface diameter;
• and
• a transition distinguishing the first surface from the second surface,
• wherein a product delivery device, which is polymeric, complementary to the second surface is disposed on the second surface and is operable by a user when a valve is attached to the open neck in engagement with the first surface, at least one of the first surface and the second surface being a sealing surface to prevent escape of propellant from the outer container to ambient when a valve is attached to the first surface, wherein a weld is present between the valve and at least one of the first surface and the second surface;
• and
• wherein the polymeric product delivery device comprises a polymeric dip tube, the polymeric dip tube being sealingly engaged with the polymeric second surface and there is no bag present.