@Barcode So, in Iceland we have this dairy product called Skyr, which is technically a cheese but is eaten the way you'd eat yoghurt, often for breakfast, maybe with berries or granola and a bit of milk or cream.
Skyr, a milk product, reacts with carbonated drinks exactly as you would expect.
How do I know? Because it's really funny to gross hung over people out by having Skyr for breakfast with fizzy orange soda instead of milk/cream.
Huge, milky, greyish-orange bubbles...