Celebrate National Eat Junk Food Day with this Harvard-created cake batter spray can

Another day, another food-themed American holiday. That's right: National Eat Junk Food Day is a real thing, and it's today.

Instead of just eating any old unhealthy food, though, why not spice things up a bit? Two Harvard students have the solution: Spray Cake, a can that dispenses microwaveable cake batter.

John McCallum, a Harvard junior, invented Spray Cake during his first-year science and cooking class. His fellow student Brooke Nowakowski encouraged the endeavor, adding that it was good for weight watchers, since you can "make one cupcake, then put it back in the fridge," she told The Boston Globe.

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McCallum and Nowakowski are currently trying to patent Spray Cake, which releases air bubbles inside the batter to eliminate baking soda. The cakes are fully cooked after just one minute in the microwave. Watch a demo of the Spray Cake in action below. --Meghan DeMaria