#22: License Plate Gas Caps
Hidden beneath the license plate, the gas cap once felt like a secret compartment built just for drivers in the know. You’d flip the plate down, unscrew the cap, and fuel up without a visible door breaking up the car’s clean lines. It was sleek, functional, and strangely satisfying.

This design was especially popular during the muscle car era, when aesthetics were as important as horsepower. But over time, fuel doors migrated to the sides, and the flip-plate trick faded away. Still, that little moment of mechanical magic remains a fond memory for those who grew up with it.
