Editing Port wine (section)

===Garrafeira===
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Unusual and rare, vintage-dated Garrafeira combines the oxidative maturation of years in wood with further reductive maturation in large glass [[demijohn]]s. It is required by the IVDP that wines spend some time in wood, usually between three and six years, followed by at least a further eight years in glass, before bottling. In practice, the times spent in glass are much longer. The style is associated with the company Niepoort, although others do exist. Their dark green demijohns, known as bon-bons, hold approximately {{convert|11|L}} each. Some connoisseurs describe Garrafeira as having a slight taste of bacon, the reason being that, during the second phase of maturation, certain oils may precipitate, causing a film to form across the surface of the glass.

Confusingly, the word Garrafeira may also be found on some very old tawny labels, where the contents of the bottle are of exceptional age.