<snip> 5. Kyptonite foil? Adamantium foil? Taking nominations.<snip>
There's molybdenum foil, as here:
http://www.elmettechnologies.com/products/Molybdenum/foil.php#calchttp://www.2spi.com/catalog/standards/molybdenum-moly-foil.shtmlat $160 for a 1.3 gram 2"x2" square of 2 mil foil, from the second source, though, gold or platinum foil would be cheaper.
-rafowell