This is indeed a clever version of the standard method bowl on tray vanish. Description doesn't mention that you need to have your trained assistant to do the standard dirty work, but hopefully magicians would assume this was the case. Colored liquid cannot be used in this trick, has to be clear water. Bowl retaining the water works in the same way as others. Bowl can be shown separate of the tray before filling it, which is a nice touch. The bowl and tray being crystal cut is what creates the invisibility illusion when the assistant walks off with the clear tray. Trick is naturally VERY angly, probably even more than on other versions, so sight lines and how far upstage to do this needs to be considered. Bowl and tray are plastic and look about like a party punch bowl and matching tray. I was surprised at how much I liked this trick. One consideration for some might be the fact that the tray is round, where many models use a square tray for ease in handling and better coverage.