Flying-free glass is an innovative, South American-born way of flying. There, plastic bags filled with water are hung in open windows and doors, in order to keep annoying insects away. The flying-free glass uses the same principle, but with a shapely, decorative glass container.Simply fill this with water so that it can produce various optical effects. On the one hand, the water acts like a prism and breaks the light into its individual colors (rainbow effect), on the other hand it enlarges like a magnifying glass through the drop shape. Flying irritates the head-standing, enlarged representation of the objects lying behind the glass. When flying by, it looks as if something is moving. That's why the fly tries to escape.This text is machine translated.