Coolgardie safe
![Coolgardie Safe at Kalgoorlie's Mining Museum, part of the Western Australian Museum.](/Images/godic/202501/06/Coolgardie_safe5714.jpg")
The Coolgardie Safe is a low-tech food storage unit for cooling and prolonging the life of whatever edibles were kept within it. The Coolgardie Safe applies the basic principle of heat transfer which occurs during evaporation of water. It was named after the place where it was invented — the small mining town of Coolgardie, Western Australia, near Kalgoorlie-Boulder.