Spanx
Spanx tells the story about how a few dollar pantyhose became an object with billion dollar revenue. Blakely, the creator of Spanx, was a door to door saleswoman selling fax machines when she came up with the idea. All she did was cut the feet off of pantyhose, and the first Spanx were born. All these weird inventions seem to have the simplest designs. What started with $5,000 in savings topped $4mil in Spanx’s first year revenue, and in 2013, Sara Blakely became a billionaire (Fundable).