Ask HN: What is your drink of choice while coding?

I don't like hot drinks (coffee). So I usually go for a cold caffeinated drink. It took me a while to find the amount of caffeine. I started hard with one redbull or monster per day - then switched to 2 diet cokes per day for a while. I realized diet coke makes me angry and nervous, so I tried regular coke lately and it works perfectly.

What do you drink to keep you awake while coding?