What is the best pressure cooker?
The best pressure cooker, in my opinion, is the All American 921 21-1/2-Quart Pressure Cooker.
Jars, presumably glass ones, can not withstand the pressures that a pressure cooker make. A pressure cooker increases the pressure in the pan, so you need a lower temperature and a shorter time to cook something, but jars burst when the pressure inside and outside the jar differ too much. It's best not to use them together.
Pressure & Temperature in Pressure Cooker as compared to open cooking bowl ... Pressure cookers are used for cooking food faster than conventional cooking ..... much higher heat capacity, steam and liquids transfer heat more rapidly. <a href="http://bestelectricpressurecooker.net/">Best Electric Pressure Cooker</a>