Designed by Oskar van Deventer and Bram Cohen, made by Mefferts 2011.
(plastic, 2.25 inches)

As shown on the left below, the puzzle spins around (keep spinning and get back to where you started). As shown in the middle below, the difficulty of this puzzle comes from its ability to be split apart along any of the three axes to allow the orientation of two halves to be changed by spinning only one half, as shown on the right below.