The study aims to investigate the determinants of green purchase intention of generation Y and Z in Indonesia, more specifically on the green straws. It was carried out quantitative methodology through disseminating the online survey and analyzing the collected used PLS-SEM. Of 394 respondents, the findings showed that the value-attitude-behavior (VAB) framework was successfully applied in this study. It meant perceived green value and green attitude significantly impacted the green purchase intention. In addition, environmental concerns were proven to be the predecessor of the VAB framework as well. The moderating effect of gender only appeared on the relationships of perceived green value-green purchase intention and green attitude-green purchase intention, not the environmental concerns-green purchase intention. From the theoretical perspective, this study contributes to the extension of the VAB framework through the inclusion of environmental concerns. From the managerial perspective, it provides the specific approaches for males and females consumer groups to awake their green purchase intentions.