Hey, i stumbled accross the “threaded dragon Eggs” from Tony Youngblood and thought, why not create a Matrjoschka/matryoshka/матрёшка from it.
In case you have not seen them:

Source: Wikipedia
So i tried and figured out the aprropriate scaling.:

Yes, i did that in Excel 🤓

So that means: on a typicial Bambu Lab printer, like the A1/X1/P1 with up to 256 mm of bed size+height, it should be possible to print at least 5 iterations.
Unfortunately i was only able to print Iteration 1-3, but it should be possible to change the tolerance etc.
Cool thing is that the first egg is 100% and the third is 200%

Two 100% Eggs will also fit in one 200% egg.
Excel sheet is attached.

Happy printing and tinkering.

Print instructions:
First Build Plate includes three versions 100, 142 and 200% sized eggs. the others are named. The last shells are printed seperately due to the size.