3. Orthodontic Retainers, Orange Juice, Retractable Saunas, Sawmill-Blade Knives

Digital dental scans produce models around which wires and acrylic are shaped into orthodontic retainers. Fresh oranges are washed, inspected, extracted and immediately chilled for juice, insulated wooden panels are joined into retractable sauna enclosures, and discarded carbon-steel saw blades are cut, heat-treated, sharpened and fitted with handles to become knives.