I think I first came across the concept of a cup holder when I visited my brother in the US for the first time. The year was 1997. Maybe cars in Europe already had them too by then, but I don’t think I ever noticed them. That visit was also the first time I learned about free refills at fast food restaurants, which maybe was the reason I even felt the need for a cup holder in the first place.
1997 man. I’m getting old!