Good clean energy. Founded in Montreal, Canada, GURU has some refreshing Sparkling Energy Drinks that have zero calories and zero sugar! Available in 3 flavors (lime, grapefruit, and pomegranate), they are crafted with organic, all natural ingredients. A bit of green tea extract gives you 100 mg of naturally occurring caffeine to provide you with that extra boost needed to get you up the mountain or through the workday. For a fizzy, all natural, zero calorie energy drink, try GURU!