Monster Absolutely Zero, with B vitamins and caffeine to help reduce fatigue, increase alertness, and motivate you to work (I mean play) harder, so generally you feel pretty damn good.

Caffeine to help increase alertness
Vitamins B2, B3, B6 and B12 to contribute to the reduction of tiredness and fatigue into a normal energy yielding metabolism
Zero Sugar, calorie free

Serve cold for maximum refreshmen