I consistently water down my monsters with sparkling water. It adds some fizz which I find lacking in the original, dilutes the overbearing flavor and makes the glass last longer. I usually sip on it through the morning.

Actual athletes would never touch a monster lol (I think they tone down the fizz so that it looks more like a sports drink), but I don't drink coffee but still enjoy caffeine in the morning to wake up. So it's usually either a monster or mate.