After Covid-19 the nonprofit program <a target="_blank" rel="noopener noreferrer" href="http://MakeWater.org">MakeWater.org</a> created a STEM Water Purification kit design that students and educators could make from around the house components. Building on that idea we thought it would be amazing if we could fit a kit in a flat envelop. We want to challenge participants to make the most efficient "build" of these kits and share them with the community.