cup smoothie
I haven't seen any other competitors for this product. Generally, I like it, however, the dimensions they gave weren't exactly correct. I use a big water cup(mug, jug, whatever) and it is 3-3/4" diameter at the bottom, and 2" up from the bottom, it is about 4" in diameter. The cup smoothie I received is 3-5/8" at the top, and about 2" down inside shrinks to 3-3/8" in diameter. My favorite cup won't fit, nor have I found one anywhere that will hold it. I found this adjustable type that has a bottom that fits into a std cupholder and tightens into it, but it raises my big cup too high and I'm afraid the center of gravity of the cup would be too hight to be stable. Oh well, keep a lookin'