The smallest (so far) of my plastic bottle to cord tools. This one uses a blade from a pencil sharpener, and like the others can be set to provide 2mm or 5mm wide cord. The blade is secured with an M2x8 screw and nut.
For one that uses #11/Xacto blades, see: https://www.thingiverse.com/thing:4802177
For one that uses "safety razor" blades, see: https://www.thingiverse.com/thing:4809987
For one that uses utility blades, see: https://www.thingiverse.com/thing:4804327
Bottle_to_Cord_Tool_-_XS.stl | 758.7KB |