Genuine BlenderBottle Brand Manufactured by Sundesa Blender Ball Mixer Inside Easy-Grip Design Ounce and Milliliter Marking Stay-Open Flip Top Easy to Clean Dishwasher Safe Large Drink/Pour Spout Secure Screw-On Lid Wide Opening for Ingredients Fits in Most Car Drink Holders No Electricity or Batteries Required Patented BPA Free! Gourmet cooks have relied on the wire whisk for hundreds of years to blend their ingredients into a smooth and light consistency. Now you can do the same with the Blender Bottle! It's prefect for mixing everything from creamy smooth nutrition shakes to salad dressings, marinades, and fluffy omelets. It also makes a great water bottle. Simply drop the BlenderBall wire whisk into the BlenderBottle along with your ingredients, screw on the lip, press down the flip top, and shake. The patented BlenderBall moves freely throughout the bottle as you shake, mixing the thickest ingredients with ease-it's made electropolished surgical-grade stainless steel and is designed to remain in the cup until you've enjoyed the contents. This Blender bottle fits 28 oz when filled to the top with the lid on.