Back in 2010, Apple signed an exclusive agreement with Caltech spinoff Liquidmetal Technologies, providing Apple with the rights to use Liquidmetal's advanced metal alloys for consumer electronics purposes. Liquidmetal's amorphous metal alloys or bulk metallic glasses posses a number of characteristic properties such as high strength and corrosion resistance while remaining relatively light and able to be cast into a variety of forms. Apple quietly tested Liquidmetal's alloys in the SIM card eject tool for the iPhone 3G, but the materials have otherwise not been confirmed to have appeared in any other Apple products, as one of alloys' inventors
