Hello, landlord. Personally, I prefer the Longkou Shake Cup made by Connecticut in the United States. The mixing ball is very powerful, and it doesn't take much effort. With a gentle shake, the protein powder can be stirred evenly, without any granular dregs, and it can also stimulate the activity of protein. The cup is also very light, and it is easy to take it to the gym. In addition to protein powder, other nutritional powders such as enzymes, meal replacement powder, and oat coix seed powder can use this cup, which is omnipotent. I hope the answer will help you and be adopted. Thank you.