Preheat oven to 400 degrees F. Spray the inside of 5 (16-ounce) cranberry cans (or similar) with cooking spray.
In a large mixing bowl, combine muffin mix, juice, cranberries (save the remaining contents from the other 3 cans for pancakes!), coconut, vanilla, cinnamon, and egg. Stir to combine. Divide batter among the prepared cans and place cans on a baking sheet. Bake in oven for 25 to 30 minutes, or until tester comes out clean.