This research delves into the behaviours, consumption patterns, and opinions of Generation Z (Gen-Z) in India concerning single-use plastics (SUPs). As the global community grapples with the repercussions of a disposable culture, understanding the stance of Gen-Z, a demographic poised to significantly influence future consumption patterns, becomes paramount. Employing a mixed-methods approach, comprising surveys, interviews, and the Defining Issues Test (DIT) based on Kohlberg's moral development theory, this study offers insights into Gen-Z's moral reasoning behind their interactions with SUPs. Preliminary findings suggest a heightened awareness (88%) of the environmental impact of SUPs among Gen-Z respondents. The majority exhibit post-conventional moral reasoning, underlining a deep-rooted ethical understanding of the issues surrounding SUPs. 55% of Gen-Z participants in this study demonstrated post-conventional moral reasoning, revealing an internalized understanding of single-use plastic's ethical implications, in contrast to 15% for pre-conventional and 30% for conventional. However, challenges such as cost, and availability of sustainable alternatives persist. This research emphasizes the critical role of Gen-Z in steering societal behaviours towards sustainable practices and provides recommendations for businesses, policymakers, and educators to harness this potential effectively.