By passing laser beams through or reflecting them off the rotating Claisen flask*, various wave-shapes lights appear around the exhibition room. In addition to a combination of several special lenses that disperse the light, the properties of the laser light draw out the properties of the flask, revealing its shape and that it has thickness, that it has an inside and an outside, and that there are small changes in its texture.* Claisen flask: a special flask used in vacuum distillation that was invented in 1893 by German organic chemist Rainer Ludwig CLAISEN (1851–1930).