What is emptiness?
According to the Buddhism Heart Sūtra, "Form itself is emptiness; emptiness itself is formed." It means everything visible is empty.
Junk food is unhealthful food that is high in calories from sugar or fat, with little dietary fiber, protein, vitamins, minerals, or other important forms of nutritional value. However, junk food looks rich and makes you feel full and satisfied. "Junk food" is emptiness.
The displaying design packages are a set of fast food packages include hamburgers, apple pie, chicken nuggets, and french fries. The package's core idea is that it looks healthy and organic for the outer pack, but it still contains fast food which is not healthy at all.
They are emptiness.