I haven't been approved for the surgery yet. Awaiting insurance decision but I am aware of the pre-op diet. MY surgeon requires 10 day liquid diet. I have tried 3 of the flavors. Strawberry, Vanilla & Chocolate. I've used 1 Vanilla CIB, 3/4 cup of soy milk or fat free milk, a little bit of ice, 1 banana and then 1/2 cup of various frozen fruits (strawberries, raspberries, mangoes etc. For the Strawberry CIB I do the same. Chocolate I use the milk, banana, ice and add a teaspoon of peanut butter or Nutella. My favorite is the Vanilla with the Mango! Hope this helps. At least I know now which to stock up on when (if) my insurance approves me....