This is a GREAT design @3DHydroPrint_1006286! I'm excited to try it out :) I'll re-comment afterwards and let you know how it went.
UPDATE:
Printed with no supports (Awesome) in PLA+.
Unfortunately, PLA+ isn't watertight so it doesn't float for very long, but I have a feeling when I reprint it in PETG, it'll work wonderfully. (edited)
Excellent!