It's pretty easy to hit 4 cups. Large cups of coffee are 20 fl oz which are ~570ml. So 2 larges in one day, which I have from time to time, will get you there.

It's pretty easy to hit 4 cups. Large cups of coffee are 20 fl oz which are ~570ml. So 2 larges in one day, which I have from time to time, will get you there. I can't really explain why I hated it with complete accuracy -- I think I just felt overall less energetic. And I felt this way when I was definitely over the effects of caffeine withdrawal.