Add the apple cider and cinnamon sticks to a crockpot.
Using a toothpick, poke holes all over the orange. Poke the cloves into the holes and place in the crockpot.
Cook on low for 3-4 hours.
To serve, add an ounce of rum to a mug and ladle in the hot apple cider. Optional: Place a cinnamon stick for garnish.