Firebrand Wine is an unobtainable beverage in The Elder Scrolls V: Skyrim.
Location[]
The bottle only appears in test cells and in the cell ThievesGuildHoldingCell, but unlike the other items there it never leaves, hence why it is unobtainable without the use of console commands.
Quests[]
Scoundrel's Folly[]
If the bribe option is selected to persuade Gulum-Ei, he will say that he has a client that wants a case of firebrand wine, which can be stolen from the Blue Palace.