Fizzy Fermented Fruit Coolers (Finnish Sima)
Feel free to substitute mulberries with 2 to 5 cups of your fruit of choice.
If you wish, when cleaning the bucket or container, you can wipe with a 2% bleach solution first, then rinse with clean water, then use the hot water.
You can also use wine yeast.
Warning! The pressure can make plastic and glass bottles explode, although my glass bottles usually just crack quietly. This is why it is good to use plastic bottles, so you can release the pressure. Open with a glass ready; the sliced lemons and cranberry version tastes like fizzy grapefruit but with a kick!