Four plastic tumblers of different sizes are displayed on the performer’s table. The largest tumbler is completely full of milk. The performer pours the milk into a smaller size tumbler and for some strange reason the milk does not spill over!
Performer then pours the milk into a third further smaller size tumbler and then again into a fourth further smaller size tumbler and the milk does not spill over in either case!
Thus to the audience it appears that the original quantity of milk, slowly and magically diminished to a very small quantity!
Please note that this effect can be done in reverse where you start off with the smallest glass full of milk and have the milk apparently increase in volume as it is poured from one larger glass into another!
This looks like real magic and is VERY easy to perform!