http://www.the-winery.net/wine-gifts-virginia/
"I can take a bottle of wine on the plane to Puerto Rico?
I'm going on vacation in Puerto Rico for a week and would like to have a bottle of wine Virginia a gift for my hosts. Is this allowed? (I know I would have to be in my checked baggage.) And PR is a U.S. territory, but that OK?
Yes, okay. Single package and the air pressure can cause leaks. It is not common but it happens. Provided they do not bring more customs wine permit. But a bottle is fine
A Few of My Favorite Things, Holiday 2009, Wine Gourmet