If I recall, that lady who sued McDonald's for serving coffee that was too hot, showed in court that the temp of the coffee was 180 degrees. Her attorney said that the coffee should never be hotter than 140 degrees.

From;

http://en.wikipedia.org/wiki/Liebeck_v._McDonald%27s_Restaurants

"During the case, Liebeck's attorneys discovered that McDonald's required franchises to serve coffee at 180–190 °F (82–88 °C). At that temperature, the coffee would cause a third-degree burn in two to seven seconds. Stella Liebeck's attorney argued that coffee should never be served hotter than 140 °F (60 °C), and that a number of other establishments served coffee at a substantially lower temperature than McDonald's. Liebeck's lawyers presented the jury with evidence that 180 °F coffee like that McDonald’s served may produce third-degree burns (where skin grafting is necessary) in about 12 to 15 seconds. (As a reference, the boiling point of water is 212 °F or 100 °C.) Lowering the temperature to 160 °F (71 °C) would increase the time for the coffee to produce such a burn to 20 seconds. (A British court later rejected this argument as scientifically false.10) Liebeck's attorneys argued that these extra seconds could provide adequate time to remove the coffee from exposed skin, thereby preventing many burns. McDonald's claimed that the reason for serving such hot coffee in its drive-through windows was that, because those who purchased the coffee typically wanted to drive a distance with the coffee, the high initial temperature would keep the coffee hot during the trip.4 However, the company's own research showed that some customers intend to consume the coffee immediately while driving."
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