Egg atand model with organic shape and egg-holes. Can be used upside down. There are two stl files with custom supports. One with gap of 0,1mm and the second with gap 0,2 mm. 0,1mm works for me fine, but needs more force to break.

You can still print it without these custom supports by removing them in the slicer.

Even PLA can handle hot egg in this case ;).