Keg of Aged Hunter's Ale

 can be received from:
 * Opening a Gift of the Traveler.

In-game description: "Uses remaining: 50" "'I trust that you will be able to get to the bottom of this.' -Nicholas"

Note

 * This item has 50 uses.
 * The inventory icon is a man in a hardhat, and reads "Under Construction". It is safe to assume that a new icon will be implemented at some point.