This one's been around for a bit, but like fine wine, great art and me, it gets better with age. More than that, it's a perfect example of the Surprise Marketing technique I call "Wear Virgin Contact Lenses" (or, put another way, try to see something old as if it were your first time).
Post's venerable Shreddies cereal has been "reintroduced" as Diamond Shreddies. The illustration below says it all:
Simple. Hysterical. Effective. Great Pow!
The company is exploiting this to the max, including a promotion where you can win actual sparklers. Check out its sublime website, complete with recipes and some delightfully funny REAL focus group sessions (well, the people are real; the moderator is a sharp imrov comedian) where perplexed interviewees reflect on the exciting innovation of a "whole new level of geometric superiority."