Mariano Martinez of Dallas needed his popular margaritas to stay consistent. His invention lead to a Mexican restaurant classic- the frozen Margarita.   Resources: https://www.laharanch.com/ https://www.smithsonianmag.com/smithsonian-institution/uniquely-texas-origins-frozen-margarita-180969339/ https://www.visitdallas.com/things-to-do/dallas-now/2017/07/the-history-of-the-frozen-margarita-begins-in-dallas.htm https://americanhistory.si.edu/blog/2010/05/frozen-margarita-machine-cinco-de-mayo.html https://en.wikipedia.org/wiki/Mariano_Martinez_(entrepreneur)