Combine cranberry juice, apple cider, cranberries, brown sugar, cinnamon sticks & cloves in crock pot.
Cook on high if you plan on using within 2-3 hours. Cook on low for longer.
Allow to simmer & warm until ready to serve- stirring occasionally.
Ladle into mugs, garnish with additional cinnamon stick
Add in one ounce of rum per mug if desired.