Bugatti has made a luxury porcelain car called the L'Or Blanc, or White Gold. It comes with two keys. One for starting the car up and one for adjusting the speed. Porcelain makes up almost every part of the luxurious vehicle, from its fuel cap to the hubcaps. Before they made the car, Bugatti tested the porcelain material to make sure it didn't break on the road.
(Source: Supercar Blondie YouTube channel)