Absolutely! You can mix your personalized protein powder and Flavor Stick into any type of liquid beverage. However, for the most delicious results, we suggest using a shaker bottle and ice-cold milk (dairy, almond, soy, or any other type). Regardless of what type of liquid you go with, aim for 4-8 oz of liquid per serving of protein powder for best results. Use less liquid for a thicker, more flavorful protein shake and more liquid for a milder one.