Building off of the tried-and-true design of the BlenderBottle classic, the pro series shakers offer features and unrivaled refinements. Say goodbye to lumpy protein shakes. Our powerful mixing system uses the blender ball wire whisk - found only in BlenderBottle brand shakers - to deliver smooth protein and nutrition shakes with ease. Pro series shakers sport an updated lid featuring a wider carry loop, ergonomic flip cap, and protective spout guard to help keep dirty gym fingers off the drinking surface. Forgot to add liquid first no sweat. The rounded base allows the blender ball whisk to mix every last bit of powder. Enjoy today's smoothie without tasting last week's protein shake. We use premium, durable, Eastman Tritan plastic to help keep your bottle fresh and odor free.