CL1P is a minimalist filament clip designed to stay completely inside the spool without sticking out.
Many filament clips extend beyond the spool and get in the way — this is exactly what CL1P avoids.
With a material usage of only ~0.3 g per clip, it is extremely lightweight and fast to print while still doing its job reliably.
The clip snaps onto the filament inside the spool, keeping the filament secured without interfering with storage, stacking, or spool holders.