In a well ventilated room, put about 1 inch of isopropyl alcohol into a quart-sized jar with a lid. Add food coloring as desired. Fill jar 3/4 full of macaroni, tighten lid, and shake to fully color all noodles. You can strain the macaroni and reserve the liquid to be used again – be sure to store out of reach of children. Lay macaroni in an even layer onto newspaper and allow to dry.