A Pen created at CodePen.io. You can find this one at http://codepen.io/nicolasbadia/pen/vefCz.

 Another experiment into CSS circles I built for a feature on the upcoming www.barrelny.com redesign.

The sticky is made from two seperate circles (front and back), which are moved and masked inversely on :hover (by the circle wrapper elements). A rotation is also applied to mimic realistic motion. Gradients are applied to the front and back to give the illusion of depth.