Owl-shrines of Naglfar and the Malgurian steppe

In the harsh northern forests and cold steppes of the Yansetel-yam continent a strange custom is practiced, thought to have originated with the great owl-pressing-tuns made by the high goblins of old. Thankfully today the wine made is not composed of pressed owls, harvested during the conjunction of moons, rather, the thing resembles a great shrine merely in the aspect of a standing owl with folded wings. These shrines are hollow, and are used as beacons during the wintertime, guiding travellers to places of civilization, however throughout the summer months, many fertility ceremonies are conducted around these shrines, wherein for every ceremony a fresh batch of berries is siphoned through a plughole to join the rest, which are fermenting and yeasting in the bottom of the shrine. At the festival of autumn's end the holy flagon is brought forth and attached to the bottom plughole, and the wine is decanted into barrels to be distributed amongst the townsfolk.
Owl shrines built along uninhabited roadways are also filled, but people may forget to come around and drain them, thus ageing the wine finely over many years. If a king wants to expand his reach into the wilds he may order new shrines built to attract people to settle near these sources of good wine, and if the area becomes depopulated there will still be motivation not to abandon it for want of wine that has been ageing for generations.