Chop Cup - Plastic with Balls India

This is an inexpensively priced plastic chop cup, which comes with two 1" crotchet balls. You place a ball in the cup and it magically jumps into your pockets. You place a ball on top of the cup and it magically penetrates the cup and is found to be inside the cup. Lot of routines possible with this chop cup and a lot of books have been written outlining the routines that can be done with the chop cups.