This great photo of gorgeous pouting models wearing black catsuits and nappies (diapers) from the 2008 autumn collection in a Tokyo catwalk show immediately made me think: Super Absorbent Polymers (SAP). Disposable nappies, including adult versions and the astronaut version (MAGs - maximum absorbency garments) are a huge growth area for acrylic acid, and worth $5.7 billion a year, according to this article in the Times.