Fine wine vinegars come from fine wines, which is why some of the finest gourmet vinegars come from the wine-producing regions of France, like Champagne or Bordeaux. Like wine, wine vinegars are aged in barrels, preferably oak, which infuse these vinegars with some of the tannins of wine. Wine vinegars are typically more mellow than regular vinegars, with a more complex bouquet infused with the qualities of the terroir where they originate. Use fine red wine vinegars with subtle oils, as to not overpower the flavors of the vinegar.