About this 3D model
This is a slightly different model of another design I've made. The goal here is to hold a normal cup, with a handle, safely in place while driving your car. Obviously still be careful, without a lid your hot beverage may still spill! The adjustable nut in the bottom is there to allow you to adjust the height, such that it's firmly supported both on the lip and the bottom. I'd suggest carefully adjusting the height so that it's just about sits on the bottom as well as on the lip. The diameter of the inset is 80mm, you can likely scale this in XY to fit your car better. If anyone has special requirements for different dimensions, let me know! I'm also including the F360 file here for anyone wanting to do their own versions.