We don't recommend the shakes and bars, etc. because it's been our collective experience here on ADBB that they have the tendency to stop or slow down weight loss in some folks.
But when I was on Induction and even on the early OWL Rungs, I drank "shakes"---my own shakes made from pumpkin puree or pureed avocado mixed with a little cream, water, pasteurized egg whites, and sweetener.