The Liebeck v. McDonald’s Restaurants (1994) “hot coffee lawsuit” resulted from McDonald’s restaurants serving very hot coffee, but what if it’s very cold outside? “The weather turned so cold in Upper Michigan last week that McDonald’s customers who spilled coffee in their laps weren’t calling their lawyers” was printed in The State Journal-Register (Springfield, IL) on April 22, 1995. “It was so cold, McDonald’s was charging extra to pour scalding hot coffee in your lap,”  American television host David Letterman said on the New York City-based Late Show with David Letterman program on January 6, 1999.
 
“It was so cold…I actually enjoyed it when someone spilled scalding hot coffee on my lap!” was printed on the Athropolis blog on February 20, 2004.
 
       
Wikipedia: Liebeck v. McDonald’s Restaurants
Liebeck v. McDonald’s Restaurants, also known as the McDonald’s coffee case and the hot coffee lawsuit, was a 1994 product liability lawsuit that became a flashpoint in the debate in the United States over tort reform. Although a New Mexico civil jury awarded $2.86 million to plaintiff Stella Liebeck, a 79-year-old woman who suffered third-degree burns in her pelvic region when she accidentally spilled hot coffee in her lap after purchasing it from a McDonald’s restaurant, ultimately Liebeck was only awarded $640,000. Liebeck was hospitalized for eight days while she underwent skin grafting, followed by two years of medical treatment.
   
22 April 1995, The State Journal-Register (Springfield, IL), Toby McDaniel column, pg. 9, col. 1:
The weather turned so cold in Upper Michigan last week that McDonald’s customers who spilled coffee in their laps weren’t calling their lawyers.
 
Google Groups: alt.support.mult-sclerosis
Late nite humor
Cowboy
1/9/99
(...)
Wednesday Night January 6
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Letterman
* The mice down there at Dunkin’ Donuts in NYC… it was so cold, they packed up and they went down to the Dunkin’ Donuts in Miami. It was so cold, McDonald’s was charging extra to pour scalding hot coffee in your lap.
       
14 January 2004, The Kent Island Bay Times (Stevensville, MD), “Two Cents Worth: How cold was it?” by Bill Evans, pg. 6, col. 5:
It was so cold I had to beg Jeanette to spill hot coffee in my lap!
 
Athropolis (February 20, 2004)
It was so cold…
(...)
8. It was so cold . . .
I actually enjoyed it when someone spilled scalding hot coffee on my lap!
 
Google Groups: alt.jokes
So Cold Jokes
John
1/16/07
It’s soooo cold…
(...)
I actually enjoyed it when someone spilled scalding hot coffee on my lap!
     
TapRooT
January 30, 2009
Friday Joke: It was so cold . . .
(...)
It was so cold . . .
 
I actually enjoyed it when someone spilled scalding hot coffee on my lap!
 
Twitter
Diane Goellner‏
@TweeterSnap
@paulttran It’s so cold that I actually enjoyed it when someone spilled scalding hot coffee in my lap. #coldjokes
11:24 PM - 11 Nov 2009
   
CNN
It’s so cold, humor edition
By Josh Levs, CNN
updated 1:40 PM EST, Wed January 8, 2014
(...)
“Someone accidentally pours hot coffee on your hands, and you say ‘thank you.’” - Mark Allen
 
New Jersey 101.5
The best ‘It’s So Cold…’ jokes for New Jersey
By Jim Gearhart February 16, 2016 8:21 AM
(...)
It’s so cold, someone spilled hot coffee on me and I thanked them.
     
Twitter
Yavin Highsmith‏
@VaCrabLover
It’s so cold outside, someone spilled coffee on me and I thanked them.
8:02 AM - 2 Jan 2018
 
Twitter
muffy cro$$wire‏
@faithgiffords
It’s so cold if someone spilled their hot coffee on me I’d be thankful
8:53 AM - 6 Jan 2018