So as you can see in the picture above there called Seetroen (get it, see as in glasses instead of citroen). They are made of 4 rings that wrap around your face and they’re filled with a blue coloured liquid that wobbles about to recreate the horizon line to make you feel less sick while driving. According to Citroen if you wear the glasses for 10 to 12 minutes it gives your brain enough time to resynchronise the movement perceived by the inner ear while your eyes are focused on a fixed object so you’re less likely to be sick over your passenger.
Priced at (a rather ridiculous) £88 they’re not exactly a cheap. But if they work, it's much cheaper than to reupholster the inside of your car.