A plastic tumbler is shown and water poured in to show genuineness and then poured back out.  At this point the orange silk is placed in and glass is then placed on a normal book or tray (not supplied), the blue larger silk is used to cover the glass and magician then renders the spectator assisting so weak they are not able to lift the glass!  Much fun ensues with continued trials.  Includes illustrated instructions.  Condition very fine.