heavy double-handled rice pot
A thick, heavy pot with two handles, traditionally used for cooking rice. The name 文化鍋 (bunka nabe) literally means 'culture pot' and is associated with a specific design popularized in the mid-20th century.
母は文化鍋でご飯を炊いている。
My mother cooks rice in a heavy double-handled pot.
炊飯器 is an electric rice cooker, the modern appliance; 文化鍋 is a traditional stovetop pot for the same purpose.
文化 is the modernizing or promotional prefix found in many product names of the early twentieth century, attached here to 鍋 for a then-modern style of cooking pot.