Aerosol Spray Can

In 1941, the USDA's Lyle Goodhue and William Sullivan used the newly discovered refrigerant, Freon, to enable the deployment of a lethal (to critters, anyway) mist by American troops fighting on insect-infested fronts. The "bug bomb" cocktail, held in a 16-ounce steel canister, consisted of Freon-12, sesame oil and pyrethrum (the last is a natural insecticide derived from chrysanthemum blooms).