04-03-2019, 02:26 AM
(This post was last modified: 04-03-2019, 05:00 AM by Common_Man.)
Looks more like the illustrator felt the need to convey the outer and inner diameters (the shape of the inner cavity as well) for some reason. So he drew one inside the other maybe ? Maybe he wanted to convey the amount that could be contained, roughly..

