This TreeFrog Whistle works very well. It sounds great. I made it from wonderful and popular https://www.printables.com/model/3116-treefrog and https://www.printables.com/model/495173-flat-pocket-whistle and then merged them into one model.
I found it prints best with supports, but you must check the box “support on build plate only” to prevent supports from forming on the inside.
The author remixed this model.
I downloaded the wonderful and popular https://www.printables.com/model/3116-treefrog and https://www.printables.com/model/495173-flat-pocket-whistle and then merged them to create a TreeFrog Whistle.