PKU Cooler 20 Red, 124 Calories Per Pouch. A ready-to-drink phenylalanine free protein substitute for use in the dietary management of Phenylketonuria. Suitable from 3 years of age. Provides the necessary mixture of amino acids, carbohydrate, vitamins, minerals and trace elements to meet daily nutritional needs. Contains DHA and EPA, provides 20g of protein equivalent per 174ml pouch, low calorie and low volume.