Crispix

Crispix is a brand of breakfast cereal, introduced by Kellogg's in 1983. It was created specifically to compete with Ralston Purina's Chex family of cereals, which had about $125 million in annual sales and no significant competition. By 1987, Crispix had sales of about $65 million.

Its box touts its unique composition of "Crispy rice on one side, crunchy corn on the other." The cereal itself is in a hexagon shape. The two sides are made in a lattice pattern and connected only at the edges; the center is open. Crispix is kosher/parve.