Vỏ trứng gà có ren M40 (Chicken egg shell with M40 threads)

I modelled a chicken egg. Could be a nice gift for easter or a rhytmic device with rice in it. This is purely practise version for me to understand the process. Please contact me for ideas and suggestions.

I printed with Prusa MK4 with all supports, brim and skirt with good results. Seam position could be random and perhaps experiment with fuzzy skin.  

For modelling I practised using Autodesk Fusion 360. Thread is M40x2. 

Edited later: after first print I discovered that I threaded the wrong way, into the shell. So the shape comes a bit short. I'll fix it when the inspiration hits.