Confession time - I will drive a car covered in mud....but I have to have a clean interior.
Use silicone muffin liners to help keep your car clean and tidy.
Placing silicone muffin liners in the cup holders of your car will help catch crumbs and contain spills. When they get dirty, take them out, wash, and replace!
Other great travel ideas here. Do you have any to add?