I got tired of fishing a tangled extension cord out from under the printer every time I needed power across the bench. Empty filament spools were already stacking up in a corner — so I turned two of them into a cord reel that actually makes sense next to a 3D printer.

This is a printed frame that snaps onto a pair of empty filament spools. The cord wraps around both barrels like a stadium track, the plug passes through a dedicated slot so you are not fighting the end every time you pull, and there is a little cubby plus a real handle so you can hang it or carry it without the whole thing unspooling into a knot.

Here is why this stuck with me: it uses something every filament-printing maker already has (dead spools), and it solves a problem that shows up the moment your printer farm — or just one messy desk — grows past a single wall outlet. The Medium size on the site fits common spool hubs; there are 79 / 82 / 93 mm variants in the files if your brand runs a different inner diameter.

Print notes that matter: you will need to cut a small notch in each spool flange so the frame seats cleanly — five minutes with a craft blade or flush cutters. Print the frame in PETG or a tough PLA; layer lines on the handle are fine, this is a shop tool not a display piece. Once it clicks on, load the cord, seat the plug through the pass-through, and park it under the desk or on a wall hook.

If you have ever kicked a power brick across the floor mid-print, you already know why this exists.