It is called pearls to swine and is a Stout realized with the use of oysters. That's right, just oysters, used in large quantities to give the beer flavors and aromas unique. Although it may seem extravagant, the use of oysters in the art of brewing is a well-known solution, which in the past has given rise to a substyle precise: that of the Oyster Stout. 5.2% ABV.