the.com/canning

means To preserve food by sealing it in airtight containers and heat-treating it so it stays safe to eat for months or years.

from From 'can,' the metal container, borrowed in turn from Latin 'canna' meaning a reed or cane — the same root that gives us canal and cannon, all pointing to hollow, tube-like shapes. The preserving technique itself dates to the early 1800s, when a French confectioner's experiments with sealing food in jars won a prize offered by Napoleon's government, desperate to keep armies fed on campaign; tinned iron canisters followed soon after, and the name for the container became the verb for the process.