Polystyrene (PS) is a rigid and transparent synthetic polymer commonly used in disposable food containers, insulation, and packaging due to its lightweight nature and excellent clarity. Although PS is not biodegradable, it remains a popular choice in applications where single-use functionality and cost-efficiency are essential.

Its versatility extends to various forms, including expanded polystyrene (EPS) for insulation and foam cups, which provide thermal insulation. However, responsible disposal is necessary to mitigate PS’s environmental impact, ensuring that its benefits are balanced with environmental considerations.