the.com/rice cooker

means An appliance that cooks rice automatically by boiling then steaming it, switching off or to 'warm' the instant the water's gone.

from A 20th-century Japanese invention — early automatic versions emerged in the 1950s, refined through the work of companies like Toshiba, which brought mass-market electric rice cookers to households starting in the late 1950s. The real breakthrough was the simple thermostat trick: as long as there's water, a pot of rice can't rise above boiling point, but the instant the water's absorbed, the temperature spikes — and that spike is what tells the machine to click off. No sensor for 'doneness,' just physics standing in for grandmotherly instinct.