The small box is perfectly designed for the cup holder so that all the change can be collected.
The idea was to keep the whole thing safe with a screw cap. The size was chosen so that it fits securely but does not get in the way if you drive a manual car or can be stored in the glove compartment.
I simply printed it in black, but there are no limits to your imagination. The file contains the lid and box individually as objects. The colors can be changed as desired.
Tip: a small splash of oil on the thread and it turns very smoothly.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.