Dr. Siegal’s shake mixes offer a cool, refreshing alternative to his cookies and contain the same hunger-controlling amino acid protein blend as his Classic cookies. Prepare in 60 seconds with a blender, ice and water. Each Weekly Box contains 21 Shake Mix Pouches. Flavors: Chocolate, Vanilla, Strawberry, Crème Brulee, and Pina Colada. All shake flavors are gluten free.