May revealed that the Kankers used to play with it in the bathtub, meaning they played with it when it was just a ship, and was bottled later because Ships-in-a-Bottle are not supposed to be played with. It is their most prized possession as they show that if it is ever taken from them, they will go on a hissy fit and do anything to get it back, even by destroying anything in their path no matter how big or powerful it is. This is why it is the most dangerous item in the show that is not to be tampered with.