Sixteen ounces is a lot to drink when all you want is energy, but that's the size of many energy drinks. Not only do you get too much fizzy liquid, but also 12 teaspoons of sugar, 200 calories and herbal stimulants. Drink a 5-Hour Energy shot. At only two ounces it goes down fast. It has zero sugar, zero herbal stimulants and only four calories. It's packed with B-vitamins, amino acids, nutrients and as much caffeine as a cup of the leading premium coffee.