This amazing cup makes milk or coloured liquid vanish. The secret is a small hole on the side of the cup (exterior).
You begin by setting up the magic trick - cover the small hole on the outside of the cup with some clear sticky tape tape. Then fill up the cup and keep filling it until the liquid fills up the interior (secret) panel.
When you perform the trick all you have to do is peel off the tape with your finger and the inner secret chamber of liquid will then vanish back into the cup.
