Today, though large pots for fermenting wine are made in Italy, the Republic of Georgia, and even Oregon, the art has been lost in Portugal. “You go sleuthing [for talhas] down in the local villages, literally knocking on people’s doors, because they are a vestige of the past,” says Evan Goldstein, a Master Sommelier and president of Full Circle Wine Solutions, which represents Alentejo in the U.S…