Any product that brands itself "novelty", "fun" AND "funny" must be doing something right! Show your friends how HILARIOUS you are by installing this in your car. It will show people what a great sense of humour you have. Of course, it's not that noticeable from the outside as your tax disc goes there. Why don't they make a window sticker with the joke on it? Product idea for next year.
Also useful if you really do need a poo.