So this looks like one milkshake cup, right? Well... a cool milkshake cup with two straws in the top.
Nope. So.... First yout unscrew the lid and take it off.
Then you pull it apart and.....
Voila! TWO milkshake cups!
I have a different flavour of fruit smoothy on each side! One was cherry and the other was blueberry. A great combo if you mix them together. And the great thing about it is, that, lets say you had only one cup that could support a milkshake, but you had two kids who wanted one, and they each wanted a different flavour. In this case, you can put a different flavour on each side and give it back to them, and voila!