Think before acting, audi stupidly in the 1st place with single dins stuck cup holder above the radio, so in summer or a cold drink, condensation drips downward, need I say more, also, sticking a cup holder in front of your radio in double din solution is a mistake, if you break hard 2 things could happen, bottle with lid may lurch forward hitting the lcd or 2nd if its open can, drink goes everywhere, hence why they removed it from DD imho.
I did this mod a long long time ago but never bothered to writeup for these reasons, as I thought about the implications of it whilst doing & thought I prefer a working radio than a convenient drink holder.