Place the ice cubes in a 16 oz. cup with a straw and lid. Add the sweetened condensed milk (I like 2 teaspoons but my husband only likes 1 teaspoon so add as much as you want for how sweet you'd like it).
Pour the hot coffee over top of the ice cubes and sweetened condensed milk. Stir until combined.
For a fancy iced coffee, add the cinnamon and vanilla and stir well.
Put the lid on top, add a straw, and enjoy the iced coffee.