Dinosaur Egg inspired Egg holder.

The ones shown in the picture were all printed with non-optimised settings and a very low quality Filament.  With some tinkering in the print settings the results can surely be optimized.

Files are provided in STEP and STL.

The upper shell comes in two versions: the one with the hole is mend for the ears, and can be printed upside down. Try to limit the support structure to the area which will later be covered by the ears. 

The Ear-less version ist best printed in its original orientation. A little work is required to remove support residue to have the two halves fit nicely together.

Have fun!