At least for me if I drink too much my heartbeat accelerates, so I have no reason to drink a lot.

I love Erva Mate (I'm Brazilian, it's how we say "Yerba Mate" in Portuguese) and try to drink some every morning. I love a beer as well.

Out of curiosity, are you from South America?

The one time I've gotten my heart rate to 192, I had about two liters of Mate in the in the morning, then ran up our local training hill (approx. 1200ft elevation gain) in about 30 minutes. No problems with arrhythmia, though.

I found out about Yerba mate when looking for alternatives for coffee. BTW, I'm in the Southern US near Atlanta.