I have purchased 3 of these bottles and they're all great for mixing my protein shakes. The little ball makes my shakes come out smoothly. There are never any clumps with this bottle. I wish they had different colors like pink instead of gray.

I already had a cup to drink my high protein drinks, but when I saw this one, I thought I would give it a try. Love it! The ball inside lets up shake up the contents easily while drinking it. The lid also closes so you do not spill any of the drink! Great to take along in the car. Thank you for making this item.

I love this mixer. It does the job well! Better than great!

Perfect size use it all the time

Oh, this bottle is the best! Don't know how I lived without it! If you don't have one, you really must order it. You won't be disappointed and it makes a huge difference when mixing your drinks. My blender just made my drinks too frothy. This bottle makes them perfect!

This bottle does a great job of mixing. The problem for me is that the cap that flips up to pour or drink from is hard to lift up. Maybe I have to use it more? I also have pinched my finger on the hinge when lifting it up.

Great Product. Bought two, one for work and one for home. The shakes are completely mixed with this shaker. A must have.

mixes extremely well; rarely any powder left on the bottom

This product works very well. Shake for 20-30 seconds and it is blended. Very few powder balls. After everything is blended for that 20-30 seconds, I then open the bottle up take out the wire blender ball and add more Ice. Wonderful product, I am going to buy more.

The cup is made of really durable, smooth plastic. Not some cheap, dollar-store plastic. The cap is really secure; no drips or leaks.