You show a newspaper and you show there is nothing hidden inside. Then you fold it three times and you pour inside some water from a glass. The newspaper is then unrolled and to the amazement of spectators, even upside down, completely overturned, water has magically disappeared. Again, the paper is folded and spring water from a height into the glass.
If you ask a layman whose effects are often the most magic, the water in the newspaper is certainly one of those effects. While this is supposed to be very simple and understandable to a layman, yet this turn apparently remains difficult to understand.
You receive transparent bag welded plastic in a very special way.