There's Only One BlenderBottle - Everything else is just a shaker cup. The BlenderBottle Classic revolutionized the industry back in 2004 with its leak-proof seal, iconic design, and the patented BlenderBall wire whisk. Now, years later, it's still the best-selling shaker on the market. Why? Because it works.The BlenderBottle Classic is the #1 best-selling shaker cup for a reason - it works. The patented BlenderBall wire whisk whips around inside the bottle as you shake, mixing even the thickest ingredients with ease. Smooth Tastes Good. Say 'goodbye' to lumpy protein shakes, and 'hello' to smooth, great-tasting drinks. The patented BlenderBall wire whisk delivers serious mixing power, putting the mesh grates in other shakers to shame. Simply add your ingredients, toss in the BlenderBall, and shake. The BlenderBall whips around inside the bottle, mixing even the thickest ingredients to a smooth and light consistency. Perfect For: Health & Fitness Supplements: Protein shakes Nutrition drinks Meal replacement drinks Fiber supplements Quick Kitchen Mixing: Scrambled eggs Pancake batter Omelets Salad dressing mixes GraviesNOTE: The shaker has a MAXIMUM filling volume of 20oz - 590ml. The scale will only work until 12oz - 400ml, because at some point the cover starts and you can not see the scale.