HomeDonutsDonut Sour Bubble Gum with Forest Berry FillingDonut Sour Bubble Gum with Forest Berry Filling Try a new taste experience with a sour doughnut! Subtle sour sprinkles awaken the taste buds, and each bite reveals a combination of sweet wild berry filling and a slightly sour aftertaste, creating a perfect harmony. Related products Mini Curd Berliner Ball with Salted Caramel Flavour Filling (by weight) Donut Donut with Cacao Glaze Donut RING OF SOUR with Strawberry Filling