The Onion Slice arrived in Purple Strong and Flexible. The model is basically the central slice of 9 concentric spheres. The model arrive in one solid block, and I have to use a lot of efforts (plus water and soap) to separate the layers: the clearance is only 0.5mm for layers of 1mm. But once the layers are separated, the result is quite good! A side effect is that only the external surface was dyed, but this gives a very nice effect. It does not turn as well as the Ring'n'Roll, probably because the clearance is so small and also because the layer are flexible and can be deformed. But still a lot of fun playing with it. Also check the video. The model is for sale for a limited amount of time because of the issue of the layers being stuck, so buy it at your own risks! I will try to redsign it with less layers, probably thicker, and more clearance.