Very convenient shaker, because It is at the bottom of the cup for filling more servings of protein, BCAA, etc. I used a lot of shakers by virtue of their training, but this was exactly what was needed for me. The only negative is the neck to drink. When snapping on it has the seal in the shape of an oval, which does not allow the liquid to flow out of the shaker. I half oval (seal) is bent after it was several closings. Because of this, when the shake shaker drops flew in all directions, flowing liquid. I cut off half of the oval (seal) :) Now with the click of a tightly closed and do not leak. I recommend!