Tinned food, also known as canned food, is food that has been preserved in a sealed container, usually made of metal. This method of preservation helps to keep the food safe from bacteria and spoilage for long periods. Common examples of tinned food include vegetables, fruits, meats, and soups. The process of canning involves cooking the food, placing it in a can, and sealing it to create a vacuum. This method was popularized in the early 19th century and has since become a convenient option for many households. Tinned food is often used in emergency supplies and camping due to its long shelf life.