Polistiren, commonly known as polystyrene, is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. It is widely used in various applications, including packaging materials, disposable cutlery, and insulation. Polystyrene can be found in both solid and foam forms, with the foam version often used for food containers and protective packaging due to its lightweight and insulating properties. This versatile material is known for its rigidity and clarity, making it suitable for products like CD cases and plastic models. However, polystyrene is not biodegradable, raising environmental concerns regarding its disposal and impact on ecosystems. Recycling options exist, but they are limited in many areas.