This is one of those original awesome tricks from old Magic kits. Royal didn't create it, but it's
still very nice.
The secret is very simple and really cool. You need to learn one simple
sleight and you can do this trick. It includes the props and instructions. For a trick to fool your
friends with, you get some nice quality out of this
This item is junk. The disk is made of plastic, not glass as the instructions claim. When you drop it in the jigger or glass, it floats before sinking and this could completely compromise the trick. What a joke! The disk does not even fit the glass provided. So what's the point of that?? They could charge a few more bucks and provide something with quality but they peddle this junk.
Penguin Magic, take this item out of your inventory.