Clean or sterilize swing top glass bottle.
Pour in ginger bug and then the juice. Make sure to leave at least a 1 inch head space.
8 tbsp ginger bug (4oz),4 cups fruit juice
Seal the bottle and leave it at room temperature for 1–3 days, depending on how warm your kitchen is. Check daily for bubbles and pressure.
Carefully “burp” the bottle once a day by opening it slightly to release pressure, then reseal. When it’s bubbly to your liking, move it to the refrigerator.
Refrigerate a couple hours. Serve chilled over ice. Your soda will keep for about a week in the fridge, though it’s best enjoyed fresh and fizzy. Enjoy!