This bottle gets the job done, but it could be better. After you shake it up and open the drink spout, there will most likely be powder caught on the spot. There will also be very thick shake at the bottom of it when its almost gone.

I think the mian problem is that if you want ot mixed perfect you need a blender. 3 stars

It's an excllent shaker
I'm bodybuilder and I like it too much
If you want to buy a shaker than buy thise one
go ahead
;-) 5 stars

im 16 and im way into bodybuilding
and when im done at the gym i lik to go into the locker room and make a protein shake and this shaker bottle is good just for that
idont no wat the other guy is using but this works with the stuff i use and theres nothing ever stuck at the top.
and its blue 5 stars

For $2, this works great. Great for taking your post workout shake with you. The only issue I had with is that the seal isn't perfect on the lid so there is a wee bit of leaked when you shake it up. 4 stars

This 16 oz.+ capacity cup definitely has more pluses than negatives. Add the milk or liquid first, then add the protein powder, so you won't have sludge on the bottom of the cup. I shake vigorously for 30 seconds-1 minute, depending upon how much protein powder I add, and definitely over the sink, because my cup does leak a little from the side while shaking. A separate screen piece inside breaks up all the clumps very well and the end result is a very smooth, well-blended drink. Mine doesn't leak when I drink from it and the drinking spout works fine. Hand-washes very easily. I wanted a fancier one initially, but now I think that good enough is good enough. 4 stars