The invention relates generally to a nebulizer, for example, of ultrasonic nebulizer(30) having a bowl shaped container (12) and a tubular energy transmitter in theform of acoustic transmitter pipe (34). One end of the acoustic transmitter pipe(34) is immersed in the liquid (14) of the container (12). The bowl shaped ultrasonictransducer (16) is operatively coupled to the bowl shaped container (12) fortransmission of ultrasonic energy to the liquid (14) and acoustic transmitterpipe (34). Absorption of transmitted energy by the liquid (14) forces the liquid(14) toward an upper end of the acoustic transmitter pipe (34) where it is nebulizedin the form of an aerosol. The invention also relates generally to a device andmethod for delivering a substance in an aerosol form into a cellular organism,and a hand held device for delivering a substance to a cellular organism.