I like the build quality of these balls a lot, much more than any other ball I've had for a cups and
balls routine.
However, as others pointed out, the magnet is way too weak. I have four
different chop cups, one of them with a very strong magnet that doesn't even work with these balls.
There is no way to get consistency in getting the cup stuck/dropped.
If you plan to use
this for a chop cup, don't even think of buying it.