Love the idea of the cup holder... and while I often joke that since my mower has a joy stick(instead of lap bars) it leaves one hand free for a beer! However with my diabeties, I get dehydrated way too fast... so its water for me!
I have not consumed booze for a good many years. In this day and age I would avoid it when mowing if for no other reason than liability issues. My dad and his dad always drank when doing fieldwork or harvest when I was a boy and incidents of damaged equipment always went up as the day progressed. I have mowed my lawn many a time while under the influence and considered myself to be quite sharp at the time. Today I know better lol.