Spool roller with desiccant for Rubbermaid 21 cup (5 liter) storage container

thingiverse

Caution: the pins on the side parts are notoriously finicky to print and prone to breaking (even with 100% infill) if printed vertically for maximum smoothness against the rollers, prompting me to consider either redesigning the layout or simply printing those laying flat on their side with supports (and sanding afterwards for extra smoothness). Following a discovery that Rubbermaid's 21 cup storage containers [amazon link](https://amazon.com/Rubbermaid-21-Cup-Dry-Food-Container/dp/B00XJRMW5M) make an ideal size for storing 1 kg spools of filament, I sought a way to utilize the spools without removing them from their container. Several viable designs for rollers utilizing 608ZZ bearings are available, but high-quality ball bearings prove expensive and likely excessive for this particular application. Therefore, I designed this contraption, featuring a bearing crafted from scrap hard acrylic tubing that forms the rollers (1/4" inside diameter, requiring modification to the OpenSCAD source if using a different size) on the 3D printed PLA pins with a thin layer of dry lubricant (PTFE, graphite, etc.) applied to the bearing surface. Additionally, I desired to incorporate desiccant into the design, leading me to create a tray built into the base of this device.