= Pressure Cooker =
A [https://en.wikipedia.org/wiki/Pressure_cooking pressure cooker ] (retort) is very efficient, cooking food three-four times faster for a given energy input.
Pressure cookers keep steam from escaping, thus increasing the air pressure inside. As air pressure is increased, the boiling point of water increases in temperature, too. This means that under pressure, food can be cooked at a higher temperature, i.e., faster, without boiling.