A bottle of Altairian Grand Premier
Altairian Grand Premier was a variety of champagne from the Altair system. The grapes for this champagne were grown in the Southern Vineyard.
In 2364, Lore mixed quadratanium into a glass of Altairian Grand Premier to knock out Data in an attempt to take over the USS Enterprise-D. (TNG: "Datalore")
The Star Trek Encyclopedia (2nd ed., p. 71) notes that the name of this beverage "could be abbreviated as AGP, not coincidentally the same initials as first-season Star Trek: The Next Generation illustrator Andrew G. Probert."