They lay down - only for you!
A small bottle is set on the table by the magician. It is seen to lay on its side. But when someone other than the magician tries to lay the bottle on its side, it jumps back to an upright position. Only the magician can lay the Imp Bottle on its side.
Very easy to do. Complete with secret, detailed directions and all necessary props. Two Imp bottles per box. Manufactured in the USA by FUN Incorporated.