The tin cannister, or can, was invented in 1810 by Londoner Peter Durand. The year before, French confectioner Nicolas Appert had introduced the method of canning food by sealing the food tightly inside a glass jar and then heating it. He could not explain why the food stayed fresh but his bright idea won him the 12,000-francs prize that Napoleon offered in 1795 for preserving food. Durand supplied the Royal Navy with canned heat-preserved food while Appert would help Napoleon's army march on its stomach.
Tin canning was not widely adopted until 1846, when a method was invented to increase can production from 6 in an hour to 60. Still, there were no can openers yet and the products labels would read: "cut around on the top near to outer edge with a chisel and hammer." The Can Opener was invented in 1858 by American Ezra Warnet. There also is a claim that Englishman Robert Yeates invented the can opener in 1855. But the can opener did not become popular until, ten years later, it was given away for free with canned beef.