I live in a tropical country. So it makes perfect sense that ice cream is an everyday food for us, especially for children. A common scenario here is an ice cream vendor peddling his product on a hot afternoon. When I was younger, I used to wonder why they immerse ice cream tubs in ice and salt bath before they head out. But I never got the chance to ask them why. Does it enhance the flavor? Does it make the ice cream more resistant to melting? It turned out that ice cream makers have been using salt and ice bath in making their product since the early 19th century. They do this to actually make ice cream freeze faster. But how does it work?