The Transmute box

The transmute box, it is the largest box I offer, because let's face it, we don't always have small vessels, it is spelled so that any vessel placed inside or indeed touching it will transmute a spirit, spell ect. to another vessel you place inside. You could put a couch against it and as long as they are touching this box, you can transmute a spirit to a couch. Shitload of power is it not? You could even transmute your spirit to the walls of your very house, but why would you?