This is a large egg with print-in-place flower petal hinged sides. Its secured at the top with a screw nut. This could be good for gifts, Easter, or perhaps as a Harry Potter golden egg prop. The egg is about 215 mm tall and 140mm wide. I left a fair mount of clearance in the moving parts so it might scale down.

Note: I made a small change to the hinge after printing my version. I have included a full width hinge test file for you to check your settings. I didn't need another large egg and so did not reprint it in its entirety.