I am with Otto but from time to time I get the cheap special at Taco Bell which includes a drink a large drink. Which I did Wed. of this week. So try to shift gears in traffic and then grab back on the cup all the way home. I have after-market Buick Lesabre seats with an armrest and cup holders but the holes are made for bottles, not large plastic cups. If I did it on a regular basis I might try one of your solutions.
