Check out this beautiful smartwatch charger shaped like a piston.
This version fits an Apple Watch charger but you can resize it to fit others and I'm happy to modify it if you can give me some measurements.
Fits the following Apple Watches:
-33mm -34mm -35mm -38mm -44mm
Super easy and quick to print, it needs no supports at all!
"All of my models are for personal use only, unless you are an active subscriber with a commercial license."
3D PRINTING SETTINGS:
-No supports needed
-Print the test fit model first for a tight fit