It works well. I have used it for almost two years. Many people who feel fit use this shake cup, which is more professional and cost-effective. The self-contained mixing ball is super powerful. Pour in the basic protein powder and water, shake and stir well. The taste is also very delicate, and there is no dough and particle precipitation. Sometimes individuals will add milk to stir, which is very delicious and nutritious. Moreover, that shake protein powder can stimulate the activity of protein, and the drink effect is better.