My sample size of German drivers is 1. I'd be interested to hear if others have similar feelings.
I don't think I've had coffee while driving more than twice in my life (as a driver, 16+ years).
Both cars I have access to at the moment do have 2 cupholders in the front bottom middle, but in one car they really suck (not high enough, very small, not flexible, anything bigger than a small can will nearly touch your stick shift) so they're never used. In the other car you can put a coffee cup there, but using both of them at the same time is also not ideal.
Oh, and the bottle holders in the doors also kinda suck, you can kinda wedge a small can (250ml, like Red Bull) in, or a 500ml water bottle, but good luck taking it out to drink. The unscrewing part is why I also try to avoid this.
That said, I never even looked if and how many and what quality of cup holders a car I was about to use/buy has.