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 Strawberry Dream Donut RING OF SOUR with Strawberry Filling Mini Curd Berliner Ball (by weight) Beignet with Raspberry Filling