Vanishing Milk

EFFECT: The magician takes a cup of milk and pours it into another cup. After the magician finishes pouring the milk he turns the cup that the milk got poured into upside down but nothing comes out of it except a white silk.
MATERIALS: To do this trick you will need, cup of milk, an empty aluminum or plastic cup does not show what's inside, a white silk, a squared sponge, a piece of hard plastic that can fit into the aluminum or plastic cup.
METHOD: Place the piece of plastic into the middle of the aluminum or plastic cup. Then place the squared sponge into one side and the white silk into the other side. When you are ready to perform the magic trick pour the milk into the side where the squared sponge is , and turn the aluminum cup over. When you turn the aluminum cup the milk will not get poured into the flour because of the squared sponge. Now all what you have to do is pull the white silk from the other side of aluminum cup.