Japan's top toymaker Bandai has released paper-thin, rose-scented bath soap that looks like the American 100-dollar bill and dissolves to create a bubble bath.

To avoid being mistaken for the real thing, the "Bubbly Bubble Bath" banknote features the winking face of former US president Benjamin Franklin, and the number 1,000 instead of 100.

A pack of 10 bills is a steal at just 250 yen, leading Bandai spokeswoman Yuka Saito to quip, "You can enjoy being rich cheap."