Put a spring in your step without the superfluous sugar and calories of ordinary energy drinks. This bubbly, citrus-flavored beverage lets you fuel your body and mind naturally with a potent blend of yerba mate, taurine, ginseng, potassium and B vitamins, plus body-fat-reducing, muscle-building chromium. Whether you’re prepping for a killer workout or just need extra juice to deal with the day’s demands, this is the healthiest way to sip your way to more ‘zip’. (Later, latte.) Box of 10 test tubes, .4 oz each.