Bring apple cider, apple juice, and sugar to a boil in a large pot over medium heat until sugar is dissolved, about 10 minutes. Divide juice mixture evenly into the bottles. Add a cinnamon stick to each bottle.
Divide alcohol into the bottles and allow mixture to cool; seal and store in a cool dry place.
Ready to serve when it cools down, good over ice. I recommend letting it sit for a few months in sealed bottles, as the longer it sits the better it gets.