Energy Shot. We think Strawberry Watermelon flavored Extra Strength 5-hour ENERGY shots are so good; they might as well have been called refreshing delicious flavor. So, whether you’re fighting the day to feel energized, or getting prepared for a large backyard cookout, Strawberry Watermelon flavored Extra Strength 5-hour ENERGY shots are the perfect companion for those who don’t want to slow down. Small size, at 1.93 ounces, make them fast to take. No refrigeration required make them easy to store almost anywhere. Pack sizes will help you make sure you have them on hand for when you need them the most. Extra Strength 5-hour ENERGY contains zero sugar, four calories, amino acids, B vitamins and caffeine comparable to 12 ounces of the leading premium coffee. 5-hour ENERGY is America’s #1 selling energy shot.