How to construct an egg cup and design it in a CAD you can see on
https://nerd-corner.com/solidworks-tutorial-egg-cup-with-solidworks-revolved-boss-base-and-fillet-feature/
or
https://www.youtube.com/watch?v=lHXmrre8l_k
https://www.youtube.com/watch?v=xwUzMaGpPVg
https://www.youtube.com/watch?v=b3Q4FIFrxuc
The author marked this model as their own original creation.