More than just a cube, the QiYi DNA Cube (Concave) is a work of art. Along with vibrant stickerless bright shades, this puzzle also features an intricately molded, lattice design on each of the pieces as well as a novel, concave shape. This is a 3x3 with a fantastic design on the outside, which also has a good speed solving mechanism on the inside.

 

This puzzle is not WCA legal and therefore cannot be used in official competition.