Most teenagers spend high school juggling homework and weekend plans, but Michael Satterlee spent his building a business powered by 3D printers. What began as a shoe accessories brand became the launchpad for something much bigger, a viral beer koozie that generated more than $300,000 in a single month. His story shows how social media, inexpensive technology, and constant experimentation can help a young founder test ideas without risking much money. It also reveals the lessons that come with fast growth, from hiring help to keeping up with demand. Here is how spare 3D printers became a real business.
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