Page 17 of the July 2001 issue of Popular Science shows a metal can with a honeycomb pattern of indentations on it, formed by water pressure. Invented by Frank Mirtsch, this technique is claimed to provide enough strength to allow 20–40% less material to be used. So why hasn’t some smart government bought the patent, and then given the technology away to anyone that wants to use it? It seems to me that doing so could greatly aid the environment.