Aerosol spray can

The modern aerosol spray can, widely used as containers for deodorants and insect repellents, was invented by a Norwegian chemical engineer Erik Rotheimin in 1962. He sold the patent to a US company at the time, but it wasn't until 1941 that it was first put to use. The cans were turned into an instrument for the US military to fight the malaria mosquito in the Pacific during World War 2.