This study assessed a locally substituted polymer, which is polylactic acid (PLA), for traditional plastic packaging, which has problems for food quality, safety, and sustainability. The main goal was to design, manufacture, and test a PLA-based jar for barangay-level food preservation. The study was conducted in three phases: gathering sustainable materials, developing the jar using CAD and 3D printing, and evaluating it for consumers' input about the plastic prototype packaging jar. It was guided by a research and development strategy using the IPO model. Fifty respondents from Barangay Sta. Filomena from San Pablo City, Laguna, ages 18 to 35, using stratified random sampling, took part. To gather the data, validated surveys were used, and ANOVA and other descriptive and inferential statistics were used for analysis. Findings revealed that the PLA-based jar was durable, safe, and well-accepted by consumers. It was rated highly satisfying by the respondents for its features and functionality for food preservation. Through the statistical data, results confirmed the environmental relevance and practical value of the jar as an efficient alternative packaging material. The results suggested that the use of a PLA-based plastic prototype packaging jar at the barangay and household community setting can promote sustainable practices, support food safety, and reduce reliance on conventional plastics.