This snail-shaped spool holder uses the spool as the snail's shell and allows you to thread the filament out of its back like a slime trail. The holder is designed for 4 cm wide spools and there are two models corresponding to spool diameters of 15 or 25 cm.
This file prints without a raft or supports (the built-in supports should be removed after printing). Ours printed nicely at a 0.2 mm layer height and 10% infill. There are two snail models for holding different size filament spools (15 cm and 25 cm). Both models are designed to hold 4 cm wide spools. Double-sided tape can be used to fix the snail to a surface so that the filament can be threaded out of its back.