This is a crude version of cupholder designed to fit an old Honda super cub - from earliest C50 to C90s. It is only compatible with the specific ones that have an air filter lid - a stainless steel piece in the middle of the legshield. It is not compatible with any later cubs that only have vent holes instead of air filter lid.

My own cub, 1966 CM91, has been fitted with one of these and it's working well for boba tea and water bottles alike. The only issue with the current version (V2, V1 not uploaded) is the slanting angle from the leg shield side is not enough and could cause trouble with long bottles. This will be fixed in upcoming V3.

The test print I used had following main parameters:
Material: ELEGOO PLA+ Black (later primed and spray painted white); Infill: 50% Triangular; Support: Tree; Orientation: Bottom of cupholder touching print bed.

Hope you enjoy using this model and I highly recommend trying it out on your own cub. I have not tested it with an original air filter - instead I have a short-nosed "cold-air-intake" filter directly attached to my carb. Please let me know if you have any further suggestions and I am happy to edit or share the model for even more compatibility across the cub family.