11.
I only drink on special occasions.
By the time you turn 30, you’ve probably encountered a specific alcohol you can no longer consume because it demolished your ability to drink it after one particularly regretful hangover. The one hangover to rule them all. I can’t even smell a cinnamon candle without thinking of the great 5th of July Fireball hangover I experienced at 24. Never again. Hangovers at 30 feel like that every time, no matter what or how much you drink. Now, I only get tipsy when I’m at a wedding, on a cruise, or watching The Bachelor. Even when I do have a few drinks, I chug water between each one.
Source: https://www.buzzfeed.com/kelsiehammond1/20-vs-30s-habits