I've designed this keychain to go along with my TB.
I did a filament change on layer 36 and changed to black.
Obviously, you could give it other colours!

Mine has text on the backside, but it's highly personal so I removed it for this file.

Print Settings

• Printer brand:

  Creality

• Printer:

  Ender 3 Pro

• Rafts:

  No

• Supports:

  No

• Resolution:

  0.2

• Infill:

  20%

• Filament brand:

  HotOrange

• Filament color:

  White

• Filament material:

  PLA

• Notes:

  Use ironing in your slicer to get a smooth surface.