They brought you the beloved Mason jar, so it makes sense Ball would come up with a great way to fill and seal it too. Featuring SmartPRESERVE technology, the auto canner precisely controls the exact time and temperature required to safely preserve most canning recipes without any additional input from the user. Ball’s most popular canning recipes come pre-programmed. To use, simply place filled jars into the auto canner, press the corresponding recipe number and wait — the auto canner signals when the jars are perfectly preserved and shelf stable. This $300 machine uses up to 85 percent less water than traditional water-bath canning and preserves recipes up to 30 percent faster.