Cola Energy drink Carbonated Tropical Sky brand/ OEM private label Tropical Sky Cola Energy is a beverage designed to deliver a boost of energy with ingredients like caffeine from naturally-derived sources, guarana extracts, and B vitamins, and itâ??s completely taurine-free. Some people may enjoy the unique flavor and the energy boost it provides. In contrast, others may prefer the taste of traditional Tropical Sky Cola Energy drink Carbonated or other energy drinks. Its designed to offer the classic Cola flavor with the added benefit of energy-boosting ingredients like caffeine and guarana extracts, which some consumers find appealing.