Add the Milk Kefir Starter (CFH) packet OR kefir whey to your juice and stir till dissolved. Add juice mixture, cinnamon stick, orange peel, lemon peel, and apple peel into a thick 32-ounce bottle with a clamp-down lid (a funnel can be helpful). (Make sure you use bottles such as Grolsch or Bormioli thick glass bottles. Bottles bought at craft stores can explode.)
Fill the rest of the bottle with water leaving an inch of room at the top.
Allow it to ferment for 2-5 days or until bubbly and fizzy. If your home is 75°F or warmer, it will take usually 3-4 days. Colder homes can take a week or longer but you'll need to check it by popping the top to see if it's getting fizzy. It will start to bubble out the top if it does.
When it's done, place it in the fridge right away. You can pour into a glass and enjoy right away but keep it stored in the fridge or it will explode. Consume within 1-2 weeks for the best flavor and most benefit.
You can use ⅓ cup of this finished kefir soda as a starter to make a new bottle. Add the other ingredients and ferment again. It should only take a half to a full day to ferment. It will continue to ferment faster and you can make many bottles over and over again!