Here is an 8020 cup holder with mount. The file will have two objects, the cup holder and the mounting plate. The mounting plate will mount to the profile first and then the cup holder will slide over the top. The mount will have an interference fit on the bottom to hold the cup holder in place with tension, as such, it is directional (note the “Up” marking on the mount).

Print suggestions:

• Print the cup vertically as it is arranged naturally (with support is suggested, but it will bridge fairly well in most filaments).
• Print the mounting plate flat to ensure the strongest orientation.