I haven't posted here in a while but the 15mm SF Facebook group liked this project of mine so here goes:
I started with a Christmas ornament craft ball and a beer:

Trimmed down the can:

Added some bitz and cardstock details:

Ta da!

Figures are 15 mm scale so it's not huge, but in theory you can make something like this as big as you can find a sphere for. I'm not sure how big the "Empire Strikes Back" one was, but I think
big...