The packaging industry is constantly evolving, driven by the need to provide efficient solutions to consumers. In this context, High-Density Polyethylene (HDPE) emerges as a key player in the transformation of packaging. This resilient and versatile plastic is not just another packaging option; it represents a fundamental driver of efficiency in the industry. Furthermore, amid growing awareness of the importance of adopting more sustainable practices, HDPE stands out as an excellent alternative to address the challenges faced by the packaging sector. Below, we will detail how HDPE influences packaging design and the way we consider the shelf life of packaged products.