Oversized bottle cap with Vault boy.
You can print this in multiple colors on most printers with single extruder!
The Vault boy is designed in multiple layers (heights). By changing filament at the correct height, you can print it in multiple colors.
Here are the heights for the filament changes (printing at 0,1mm layer height):
You will have to manually paint the white area in the mouth (or leave it as red). It's not enough to warrant an entire layer by itself.
Attributions (parts remixed from these sources):
Nuka Cola bottle cap by robert111512, CC BY 3.0
I recommend printing the bottle cap at 0.3mm layer height, then switch to 0.1mm at 16mm.
The author marked this model as their own original creation. Imported from Thingiverse.