The contract aims to conduct a detailed review of the conceptual design and propose different options for operational components of indoor litter containers (LCs). These options will be tested on-site, and the most suitable version for each component will be recommended for long-term deployment. The scope of services includes reviewing the conceptual design, proposing prototype versions, preparing production drawings, producing prototype samples, conducting on-site testing, evaluating performance, analyzing data, and preparing final reports and operation manuals.