This article debunks six common sustainability myths in the packaging industry, revealing the data-driven truths behind thermoforming technology. It challenges oversimplified narratives—such as the beliefs that all plastic is harmful, paper is always superior, or sustainable solutions are inherently more expensive. By highlighting the importance of lifecycle analysis, material efficiency, and application-specific engineering, the guide demonstrates how modern thermoforming empowers brands to create lightweight, recyclable, and cost-effective packaging that meets both environmental and operational goals.