Roll Film Holder for 120 film - Two Rolls
Update - I have a slightly newer film case you should check out, here http://www.thingiverse.com/thing:671484 - this is still a great case, I am just partial to the new design.
This is a two roll holder for 120 film. 120 film has a tendency to unroll slightly outside of the camera, this is a great way to keep your film safe and sound before or after shooting it.
This prints without supports and snaps together rather nicely.