This is my first public model for everybody. It is printable without supports. Many ways to print it. First try to print the top part to check if last 20 layers will go over the big hole.

UPDATE> Invisiball 2 STL is without my textlink in model (removable in slicer) version 2 is a bit better. Easier to print and has some bends at ground to hide cables if you want to make a lamp from it ;)