Originally Posted by Sally Pineapple
I have the shake container with the little metal ball inside it and it blends very smooth. I have never tried WS with a spoon because all shakes seem to be hard to mix that way to me.
There is one called a "blender bottle" that is great. The top twist tight, like most of them, but has thick screw-like grooves so it doesn't pop off east, even if you shake a carbonated drink that would erupt. Also, the top mouth piece portion is a piece that is actually extremely tight and takes a lot of force to open/close compared to others and won't just pop open by itself. VERY nice. I think it holds about 20 or 24 oz. Can't remember off the top of my head, but it's a very thick plastic.