N is for .... Novelty

Happiness ain't a thing in itself --it's only a contrast with something that ain't pleasant. And so, as soon as the novelty is over and the force of the contrast dulled, it ain't happiness any longer, and you have to get something fresh. - Mark Twain

Somehow in my mind, novelty equates with 'interesting but of no real use'. Are novelty teapots ever made for use? And, in which case, what is the point of making a piano shaped teapot?