G2 Low Calorie Powdered Drink MixG2 low-calorie powdered drink mixes give you a quick and easy way to rehydrate. Delivers needed electrolytes and carbohydrates, but only 20 calories per 8-ounce serving. Dissolves quickly and easily in water. Cool, satisfying taste. Energize and rehydrate without caffeine. Beverage Type: Flavored Sports Drink; Flavor: Orange; Packing Type: Packet.