What is everyone using for a cup holder in their classic?

Rowing the 4-speed and manual 16:1 steering. Can't do all that with one hand... no cup holders, no drinks :)
Had a conversation with my wife about that on my way home one day. (I tried to have a conversation anyway) Hard to hold the phone, shift and steer with only 2 hands. I held the phone between my cheek and shoulder and ended hanging up on her accidentally with the touch screen. Sorry dear, too busy driving, can't talk! :rofl: