Wikipedisa - Esky is an Australian brand of portable coolers. The term "esky" is also commonly used in Australia to generically refer to portable coolers or ice boxes and is part of the Australian vernacular, in place of words like "cooler" or "cooler box" and the New Zealand "chilly bin". The term derives from the word "Eskimo" ... (invented in 1952) ... by 1960, 500,000 Australian households owned one (in a country of approximately 3 million households at the time).

hmmm, the current esky no longer has a steel body, but I'm sure it can still serve as a seat.