The Herbalife Protein Drink Mix(PDM) mixes really well with Formula 1 and water to create a rich and creamy shake. So that means fewer trips to the shops and no refrigertion required. Typical usage is one or two scoops of the Protein Drink Mix with two scoops of Formula 1 in the flavour of your choice mixed with cold water. PDM has been described as your own home made soy milk!