Auto Milko

The performer shows two clear empty glass tumblers, and a transparent plate. One empty tumbler is placed face up on the table, covered with the glass plate, and the other empty tumbler placed over this.

Milk or any other coloured liquid is now poured visibly into the tumbler on top till it is almost full.  The performer now places a temporary screen (an open book or magazine) in front of the glass to hide the props for a few moments.  The screen is then blown or dropped down, and the liquid has magically transferred from the glass on top to the glass at the bottom.