Crystal Light Raspberry Lemonade Drink Mix comes in a 1.8 ounce pack. Summery sweet to tantalizing tart with only 5 calories a serving. Choose from some of our most popular flavours to help keep you hydrated and feeling refreshed. 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.