• 28 oz. stainless steel cup
• Mixes as you shake
• StayOpen Flip Cap stays put
• Large drinking/pouring spout

Power up your routine with the bottle that's ready for action. Whether you mix up your favorite shakes for workouts or workdays, the BlenderBottle's patented, stainless steel BlenderBall delivers perfectly blended drinks without missing a beat.Special Features:Patented BlenderBall mixes as you shake. Convenient Patent Pending Loop makes it easy to carry BPA-free materials. Wide opening make it easy to add ingredients. Stay Open Flip Cap stays put - open or closed. Embossed ounce/milliliter markings GripperBars offer a solid hold both 28-oz and 20-oz sizes fit in your cup holder.Top-grade engineering works right, every timeLarge drinking/pouring spout.

An all-in-one protein shaker and storage system for serious athletes. The BlenderBottle ProStak shaker combines a durable, leak-proof shaker bottle with interlocking storage containers, making it easier than ever to carry nutrition and supplements on the go. The bottle boasts an updated ProSeries lid, featuring a SpoutGuard to keep germs from the drinking surface, a secure flip cap, and a wide carry loop for easy portability. The powerful mixing system utilizes the BlenderBall wire whisk found only in BlenderBottle brand shakers to mix even the thickest ingredients for smoothies, protein shakes, and meal replacements.