Filament spool rollers for Rubbermaid 21 cup container

Rubbermaid sells US made 5 L food storage containers that are the perfect size for storing single 1 kg 3D printer filament spools. They also sell a cereal box lid that seals these containers for use as a dry box with a flip top to allow printing directly from the container without drilling holes.

This roller assembly was modified to fit in the bottom of these containers allowing spool clearance to the flip-top lid all printable on a Mini+ 180x180 mm print bed. You only need to press four 5x16x5 mm 625-2RS ball bearings into the ends of the rollers, press the rollers together using printed hex pins, fit the rollers between the side plates, and press the side plates onto the base plate. 

No print supports or additional hardware is required. I reproduced the sequential bridging features in the bearing pockets, but printed my rollers with the bearing pockets facing up, so no bridging is required at all. The horizontal pin holes in the base printed well enough without supports that I didn't bother to teardrop them.

I plan to design an insert for the flip top lid next to allow the filament to be fed directly from the storage container into your printer.

I clipped Wilhelm's base to fit on a 180 mm print bed and moved the side plate interfaces apart to add roller locating pins. I shortened Joseph's rollers, switched to smaller 625 bearings to fit in the container, and added pilot bores.