With our newest bottle design, you can shake and mix anything you want with ease, including protein powder, supplements, milk shake, smoothies and more. For best mixing action, hold gripper bars and shake from the wrist. Powders mix best when liquid is added first. Dishwasher safe, or just simply rinse with water and wash with hands.The product could also be a fancy gift for families and friends. Also you can imprint company logo to promote business.