Print the body in Vase Mode, The diverter with a standard infill, and the cap is optional. No supports required, they are all tall prints, but otherwise should be pretty easy ones. The quantity and size of the bits you fill it with affect the sound, I cut up the bits of filament left on the ends of spools, some supports from a prior print, and some small parts of failed prints for my fill in this one. Once you have the noise level you want inside glue the ends on.
The author marked this model as their own original creation.