Air conditioning
Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by US inventor Willis Carrier. The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States.
The Icee Company
Knedlik partnered with the John E Mitchell Company in Dallas to develop the machine, for which Knedlik received a patent in 1960. The first machine was made from a car air conditioning unit. It worked by combining and freezing water, carbon dioxide, and a flavor mix. After 5 years Knedlik's idea had become the iconic Icee Machine after drawing the attention of 7-Eleven. The convenience store chain purchased several machines and later changed the name to Slurpee based on the slurping sound people make when drinking the beverage.