Dark Fruit Sour Ale with Raspberries. By adding real fruit to their foeder aged Cuvée Freddy, Alvinne obtain a deliciously sour fruit beer. As fruit is seasonal, these beers are limited throughout the year. Alvinne produces world-class sour beers. Alvinne works hard to uphold their reputation, which Alvinne showcase by serving their beer in top bars worldwide.