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fill level

The level of a wine’s surface in its bottle. In a bottle with a high fill level, the surface will be just below the bottom of the cork. A fill level that comes only midway up a bottle’s shoulders means that more oxygen can reach the wine, causing deterioration through OXIDATION. Fill levels reduce over time owing to several factors. A faulty cork may allow for leakage, or extreme temperatures can cause the wine’s expansion, which can loosen the cork and cause leakage. It’s a good idea to check the fill level of older wines. See also ULLAGE. 
Related Links: potassium metabisulfite, sulfur dioxide (SO2)
© Copyright Barron's Educational Services, Inc.
1995 based on THE WINE LOVER'S COMPANION,
by Ron Herbst and Sharon Tyler Herbst.

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