Vita Crunch cereal boxes by Mark Oliver, Inc: brilliant use of product photography on packaging to clearly signify contents. (Can’t think of a more logical product differentiation scheme.)
Even the type treatment, with its strokes & drop shadows, though fairly common in the context of cereal box typography, here serves to heighten the illusion that each box is transparent. Giving consumers a trompe’l'oeil moment of X-ray vision. (See also: Packaging & What Lies Beneath)
Doesn’t seem as if these boxes were ever produced. Sadly.
Beach Packaging Design