Up till the 1800s, Canned foods didn’t exist. In 1795, Napoleon Bonaparte was having problems with food preservation due to which his troops were not getting adequate food. Consequently, he offered a prize for anyone who could bring forward a method of preserving food during long journeys. Nicholas Appert won this prize in 1810 by sterilizing food in a glass jar container. Later in the same year, Peter Durand made the world’s first iron and tin can.
Combining the sterilization process and the iron and tin can, the food was kept fresh for a long time. However, there was no can opener available. Hence, troops used to smash the tin can with a hammer and chisel. Almost half a century later, in 1858, Ezra Warner invented and patented the world’s first can opener.