This is an excellent prop! He customized a high end gumball machine made out of solid metal with real glass.
The method allows you to produce a vanished item, such as a ring with a lot of options. You can produce it on the first turn of the handle or the second, third, etc.
Obviously, it is a bulky prop, so it is probably best suited for a more formal show.
Another caution is that the ring is loaded via your own method. A simple method is described, but there are other ways of loading. See the suggestions section.