Fitlosophy Blender Bottle Fit Fuel Mixer Our 20-ounce shaker bottle includes oz. and ml markings for easy portion measurements. Patented Blender Ball mixes as you shake. Perfect for smoothies and protein shakes! BPA-free, odor-resistant and dishwasher-safe. Nifty sport loop top makes our protein shaker bottle easy to carry or clip to your gym bag. Durable leak-proof design with secure snap top.