As Frederick says below, "Air is compressible, liquids are not." Air
is also expandable, which means that the removal of the cork when
you're ready to drink is a lot easier with a little air space between
the wine and the cork.

Rob

Good point. No idea how Andie is going to get those corks back
out unless he drills a small hole down through the cork to provide
an "airway" to let in some air while pulling the corks. Interesting
problem............ ;o)

Frederick