Crystal Light Peach Tea Mix comes in a 2.7 ounce pack. Choose from luxurious fruity favourites, decaffeinated tea, and green tea with antioxidant vitamins A, C and E for a low calorie way to water your body. Crystal Light, and the international version, Clight, are low-calorie, fruit-flavored refreshment beverages. They are available in both powdered and ready-to-drink varieties. Crystal Light and Clight On The Go are single-serve packets of powder that can be added to bottled water for a tasty drink anytime, anywhere.