Just pretend that it's white marble (which she wouldn't have access to unless she's rich) not porcelain. And that metal drain, still metal but it works off of Aqueducts. The water has to be carried in, though.
I didn't really spend much time thinking about this when I made it, and I didn't spend much time making the picture exactly right. It's not supposed to be canon, nor correct for the setting, but I drew her completely screwy. The proportions are all wrong. I hate the picture, but I love the joke.