Ullage

The space between the wine and the top of the container, such as a barrel or bottle, which can indicate wine's age and storage conditions.

FAQs

What is ullage in wine bottles?  

It is the free space, the gap, between the wine and the bottle.

Does ullage affect wine quality?  

It can affect the quality, as oxygen remains in this space.

How is ullage managed in winemaking?

During bottling, and before sealing with the cork, the bottle is filled with an inert gas, usually nitrogen.