Granite Ware's water-bath canners have been the standard for canning for over 100 years. The design of our canners produces more even heat by allowing more boiling water contact with the top half of the jars. Used to elevate food temperature above 212 Fahrenheit for 15 minutes or more, which kills all the bacteria found in high acid fruits and vegetables. The water-bath canner creates a vacuum seal when the jars cool, sealing out air and bacteria. High heat, metal tools and dishwasher safe. This allows you to safely store preserves, jellies, pickles, relishes, salsas, chilies and more, without refrigeration. Canning is also a great way to create unique, personalized gifts for family and friends.