This study examined associations between delay discounting and usage of individual water bottle and reusable bag. Delay discounting is a phenomenon in which the value of a reward decreases when there is a delay in receiving the reward. Those who are more likely to choose larger later rewards over smaller sooner rewards are considered to have lower rates of delay discounting. Individual differences towards delay discounting correlate with self-control behaviors such as smoking or taking illegal drugs. Although using plastic bottles and bags is convenient at that present, it could lead to environmental pollution in the future. Therefore, an individual with lower rates of delay discounting may tend to use individual water bottle and reusable bag. Undergraduate students completed a delay discounting task involving a hypothetical monetary reward. Participants then recorded their usage of individual water bottle, reusable bag, plastic bottles, and plastic bags for one week. Results showed that participants with lower rates of delay discounting were more likely to use individual water bottles and reusable bags and less likely to use plastic bottles and plastic bags.

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