WoWDB

This achievement will take a full year to achieve because only one flavor is sent out per month. The brews have a duration of 14 days once they are taken out of the mailbox, but players can buy additional bottles of that month's flavor (during that month only) by visiting their faction's Brew Vendor.

• Alliance: the vendor is standing next to Larkin Thunderbrew in the Stonefire Tavern near the entrance to Ironforge, on the outer wall between the Auction House and The Mystic Ward. Stonefire Tavern is marked by a mailbox out front.
• Horde: the vendor is standing next to Ray'ma in an alcove on the east side of Grommash Hold in the Valley of Strength in Orgrimmar.

Replaced by  Brew of the Month in Patch 3.1 as a criterion of the  Brewmaster meta-achievement.