A pressure canner is a specialized kitchen appliance used for preserving low-acid foods, such as vegetables, meats, and poultry. It operates by sealing food in jars and using steam pressure to raise the temperature above boiling point, effectively killing harmful bacteria and microorganisms. This method ensures that the food remains safe for long-term storage. Using a pressure canner is essential for safe home canning, as it helps prevent foodborne illnesses. Unlike water bath canning, which is suitable for high-acid foods like fruits and jams, a pressure canner is necessary for achieving the high temperatures required for low-acid foods. Proper use of a pressure canner can extend the shelf life of preserved foods significantly.