Don't forget - you can use the Torani or DaVinci sugar free flavored "syrups" in your shakes - that's how I do mine! Nothin' better than a Mocha Cream shake w/ a bit of decaf inst. coffee granuals, vanilla SF syrup 2 ice cubes and 10 oz water...blended to pure yumminess!!
They have TONS of flavors in those syrups but the vanilla is my favorite!! (oddly enough!)