Perfect for on the go people. Sealed so you can throw it in a purse or gym bag with out worrying about it leaking. More convenient than shaker cups because there is no messy powder to deal with. Great taste, high protein, low calorie. BOOM!
In my opinion, they do not. As an athlete, I've tried this product a few times as a way of recovery. Although, it is not my favorite drink, I cannot taste a difference between the regular & diet muscle milks.