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 Donut with Marshmallows Pink Donut Mini Curd Berliner Balls with Vanilla Flavoured Filling Berliner with Caramel Filling