The wooden coil in the foreground and the wooden rods in the background: two polymer structures symbolizing the same basic polymer, the plastic polyethylene. Highly scaled up molecular structures, we might say. And these differently arranged structures also have different properties. In the case of a thin plastic bag, these are: transparent and flexible. Deep inside, it looks like this amorphous, disordered structure. And a hard-sided suitcase, on the other hand, looks like these wooden rods standing close together.