Tried out tons of filament clips but weren't happy with them. The ones grabbing the spool come off. Others bend the filament and leave dents and curves which are bad for ptfe tubes. Some aren't suited for storing a bunch of spools in a messy box. So I made this one and it works great for me. Clip it to the end of the filament and then either clip it to a random loop on the spool, or run your finger once around the spool lifting up the final loop, so you can attach to to the same loop twice. One pull to tighten it and it's perfect.
Print in PETG, 100% infill.
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