I've tried many filament clip designs, and this is the best I've been able to come up with. Since it clips the filament to itself, it will work with any spool (or no spool) and any type of filament.
Best printed with PLA, no supports, good bed adhesion is important.
(5/8/2023) Improved geometry to make the filament snap in more securely!
2/22/2024 Improved clip function
The author marked this model as their own original creation.