Place PET DairyPure milk in 2 cup glass measuring cup. Microwave on 100 percent power (high) until hot, about 2 minutes 20 seconds. Place hot PET DairyPure milk and sugar in a blender. Cover with a vented lid and blend until frothy, about one minute. Top coffee with frothy PET DairyPure milk. Sprinkle with cinnamon or grated chocolate.