A disposable ''''single shot'''' ultrasonic nebulizer that includes a sealed thermoplastic shell encasing a measured unit dose of nebulizable liquid that occupies less than one half of the shell''s volume. The single shot cartridge type nebulizer includes an integral outwardly protruding liquid collecting nebulizer cup that progressively thins to an ultrasonically transparent dome shaped bottom wall. At an opposite end of the shell cartridge are three outwardly protruding measuring cups that provide a frangible inlet-outlet structure and also provide supporting feet for the cartridge when the cartridge is stored, shipped, etc., upside down.