An exquisite container

A gold nanocage covered with a polymer is a smart drug delivery system

		VIDEO: Lycurgus, King of the Edoni in Thrace, is ensnared by the nymph Ambrosia in the form of a vine. The famous Roman cup looks green when lit from outside but... Click here for more information.

In campy old movies, Lucretia Borgia swans around emptying powder from her ring into wine glasses carelessly left unattended. The poison ring is usually a confection of gold filigree holding a cabochon or faceted gemstone that can be broken to empty the ring's contents. It is invariably enormous — so large it is rather odd nobody seems to notice it.