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Slush Powder is a substance that absorbs many times its weight in water. A small quantity in the bottom of a glass will cause water poured into that glass to become a solid mass of jelly in just seconds. A classic way to use Slush Powder is to secretly put a small amount in a Styrofoam cup, then in front of the audience pour water into it. Using a knitting needle or kitchen knife (not included) you spear the cup through the middle and turn it upside down proving the water has vanished. Comes with instructions and performance ideas. You can get many performances out of a single bottle.