Just built a quick project. Kind of weird, but was searching through some junk boxes, and the parts just sort of lined up. Found a large clear plastic dome (thought they were smaller, for something else I'm working on), decided it was much too big. Then I found an ultrasonic fogger unit salvaged from a humidifier. So I got a little side-tracked, and took it apart, just to see. Put longer wires on the transducer and sense wire, drill a large hole in the plastic dome, hot glued it all together. Used one of the dog's bowls for a base. It fogs up pretty good, but there is sort of a fountain jet above the transducer. Need to put something over it sometime so it doesn't splatter on the sides. Had a RGB LED circuit still on a breadboard, so shoved it underneath in the dog bowl. Have to double up on the LEDs, but looks good for just an hour worth of work.