A quick-printing snap-together spool for eSun's "Refillament."
It sucks that, every time you buy filament, you're stuck with this absurd non-recycleable polystyrene spool that you just have to chuck in the garbage to be carted off to a landfill somewhere. Repurposing them as storage containers or wheels is cute the first couple times, but after a while, the ever-growing stack of empty black husks starts to wear you down.
I've printed several rolls of eSun's loose PLA on this spool without issue. It spins freely, doesn't get snagged, & the little holes make it easy to store the filament when not in use.
You need 2 disks & 3 snap hooks. The hooks should be printed upright (as shown in the photos) so the flex fingers are flexing in the correct plane. Print at 100% infill, because everything is essentially flat anyways, so why not? I've also included the Fusion 360 file if you want to resize it for whatever filament you like.