Before the invention of the icebox in the 19th century, shopping for provisions was a daily chore. Then someone figured out how to keep meat, butter, and milk fresh by putting it into an insulated box with a block of ice. By the 1930s, every kitchen had an icebox.
Message to Mom: Stock up a few days ahead and let the ice man do the daily hauling.
Legacy: The four-door stainless-steel fridge with adjustable temperature zones and in-door crushed-ice dispensers.