If you can tell what this mystery item is, either you're getting old or your car is.Here's a few hints before you guess: these little additions became standard in almost all cars in the 1950s, but disappeared in the 1990s and early 2000s.Now, there's a good reason you don't see them anymore, but some folks are pretty mad they're gone. You see, they're used for a habit that lots of people still do, and paying to add one to your car can be expensive.Have you given up, or did you know right away?PinterestThat's right, this little