Plasteel Cylinder (KOTOR I & II)

Plasteel storage cylinder from Star Wars: Knights of The Old Republic I & II

I used a weak mechanical pencil spring from the base to the top of the center rod, to keep the panels at the top of the cylinder. The thickest panel is the lowest, then thinner as you go around/up. The "cap" panel doesn't move and stays on the top.
I included an separate .stl file for an optional panel that you could use in place of the "stepped" panels which is simpler, but this isn't as accurate, and won't create