Compact Filament Colorizer

#Requirements
- Chisel nib refillable permanent marker (nib width: 2-8mm)
- Refill ink for permanent marker
- Paper clip
- Polyurethane foam sponge
- Double sided tape (including peeling layer)

##It may be necessary depending on the printer
- Drinking straw or PTFE tube
If you use a 3mm diameter filament, use a thick straw/tube
- Silicone spray (contains no solvents)