Save the strength work for the gym. Snap shut the secure-lock lid for a quick, leak-proof seal. Say goodbye to lumpy protein shakes. Our powerful mixing system uses the Blender Ball wire whisk found only in Blender Bottle brand shakers to deliver smooth protein and nutrition shakes with ease. Forgot to add liquid first No sweat. The rounded base allows the Blender Ball whisk to mix every last bit of powder. A flexible, ergonomic carry loop provides a comfortable hold for easy portability. Or use the loop to secure keys or attach the bottle to a gym bag. 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.