"It's not just the juice in the package."

As experts can testify, super sleuths in the wine business must study the cork, glass, sediment, wrapping, labels and how full a bottle of wine is to ascertain whether it's the real deal. And as two uber-wealthy wine collectors can tell you as they square off in federal court over some questionable bottles, even that sometimes is not enough.

Testimony began Wednesday in a civil trial six years after Florida energy maven William Koch, a yachtsman and collector, sued onetime-billionaire California businessman Eric Greenberg in U.S. District Court in Manhattan over $320,000 he spent in 2005 on two dozen bottles of wine that turned out to be duds.

The trial threatens to pop the cork on the dirty secrets of the wine auction world, which like the art market has been stung in recent years by a proliferation of fakes.

Read more at the AP.