SlimFast meal replacement shake mix has only 260 calories, gives you 1/3 of your daily nutrients (like fiber and protein), and is packed with Vitamins & minerals. Directions for shake mix: Combine one level scoop ¼ cup (33g) of our delicious shake mix with 1 cup (250 mL) of 2% milk in a large glass or shaker. Stir or shake well and enjoy! If you prefer a thicker shake, blend shake mix, milk, and 1/2 cup (125 mL) of ice in a blender until smooth.