MILLCOMPOSTS is an urban composting solution that doesn't hide. It aims to remove key barriers to its integration to the city and to people day to day's life in order to increase the production of bio compost out of raw materials produced by large cities, kitchen and garden left-overs. MILLCOMPOSTS chose to reveal the beauty of the composting process as well as focused the discourse on the result, the large variety of composts produced. An in-depth investigation led to design a compost service that engages the whole neighborhood led by by a Compost Master. It's technical and formal design picks-up on elements from the natural process as well as techniques developed by Humans since the beginning of agriculture to fulfill the project requirements.