The Philippines is one of the leading contributors of plastic waste. Repurposed secondary packaging holds great potential in reducing waste in the country as it extends the life of packaging meant to be thrown out already by giving it another purpose. This study aims to determine the factors that influence the consumption of repurposed secondary packaging among grocery shoppers in Metro Manila. The study utilized regression analyses to determine the effects of attitude, subjective norms, personal norms, and perceived behavior control on predicting intention, and the relationship of intention and habit strength on predicting behavior. Findings revealed that attitude, subjective norms, personal norms, and perceived behavioral control are significant predictors of intention. Additionally, both intention and habit strength both significantly predict behavior. The results provide empirical support for the extended theory of planned behavior model. The findings of this study are significant for governments and the private sector so that the consumption of repurposed secondary packaging among grocery shoppers could be promoted to reduce the environmental footprint of packaging.