Now you can mix smooth, lump-free drinks quickly just by shaking! The patented Blender Ball moves freely throughout the bottle as you shake it, mixing the thickest of drinks with ease. Simply add your ingredients, shake and drink (or pour)! Blender Bottles are a perfect match for mixing protein shakes, eggs, salad dressings and much, much more. A necessity for anyone who does any kind of mixing. Comes in a variety of colors!