120mm Film Holder with cover Rev 2

Variation of my current 120mm Film Holder. This version doesn't have the tabs. This version, I'd just use rubber bands, or something similar, to hold the lid on. More basic then my other design, but no worry of the tabs breaking off. In this case, as long as you've got the lid secured with rubber bands, you shouldn't have to worry about lid accidently coming off.

Edit - I printed this out, and the lid stays pretty secure to the body. If you think it will be bouncing around a lot in a bag, etc., secure it with a rubber band, but under normal conditions, it would be fine as is. Use your own judgement. Each printer will be different.

Side note, flip lid 180 degrees to print.