Sample filament spool

thingiverse

This clever solution eliminates those frustrating little rolls of filament that tend to tangle up on your printer. I was fed up with the filament winding around and getting stuck, so I came up with this design where all you have to do is unwind the filament sample however you want, then tightly wind it onto the roll. It even features a small hole to hold the end of the filament in place, but I recommend bending the ends a bit so they don't slip out.