1. The shaker bottle with mini propeller-shape stirrer, make the protein powder dissolve faster and downright. 2. Two kinds of shaker bottles with two kinds of power source-battery and USB. The shaker bottle with battery can be used everywhere and with USB has a vacuum chuck on its bottom.  3. Oblate cap on the lid makes it convenient to carry. Finally. this bottle could also be a fancy gift for families and friends. Also you can imprint company logo to promote business.