This is a remix of @ulitiy's nice floater for the ultrasonic mist maker:
https://www.thingiverse.com/thing:3900020
This thing floats on packaging foam, rather than on infill air pockets that are rather difficult to print watertight.
OpenSCAD file is included.
I printed this with PETG on the textured PEI sheet, and used “Archimedean Chords” as the bottom infill pattern.
I used soft packaging foam, cut it roughly to shape, and squeezed it into the floater. No glue necessary. I am also using this splash guard:
https://www.prusaprinters.org/prints/20578
The splash guard fits both the original design as well as this remix.
The author marked this model as their own original creation. Imported from Thingiverse.