RightSize Health & Nutrition, Lake Zurich, Ill., introduced four flavors of single-serve smoothie packs. The smoothie is made by blending one packet in 8 ounces of milk. They are sold in eight-portion variety packs (which include two of each flavor) like Lean Cocoa Bean and Slend-A-Berry. The smoothies contain 15 grams of protein (with milk) and are caffeine-free and gluten-free. The products can be found online and in retail stores nationwide.