Created a set of bar ends designed to plug on a standard bottle cap from your favorite brand.
Took the clamping idea from https://www.thingiverse.com/thing:3424052
Fits inside a bar with an inside diameter from 18 to 21mm
Add a pause to insert the nut.
Printer:
Bambu Labs X1C
Rafts:
Doesn't Matter
Supports:
No
Resolution:
0.2
Infill:
60
Filament: esun ABS