See:
http://www.ajc.com/search/content/living/0505/12hotlatte.html
"Hot joe on the go could hit the spot for busy consumers
In a mobile society with a technology fascination and a taste for culinary innovation, food that cooks itself might just be the next big thing.
By KIM SEVERSON New York Times Published on: 05/12/05
In the world of food packaging, some innovations are like Post-it notes: You didn't know you needed them until they were invented. Witness tea bags, canned tomatoes and juice boxes.
Wolfgang Puck introduced a new line of lattes this month. That the Los Angeles chef has stamped his name on yet another product isn't surprising. But the container is: It heats itself.
Pushing the button on the bottom of the can activates the heating mechanism in a new line of lattes by Wolfgang Puck. The technology is expected to expand to other foods.
It took a California company named OnTech seven years and $24 million to create the self-heating cans, which are activated by pushing a plastic button on the bottom. Water flows into a sealed inner cone filled with quicklime, which is mostly calcium oxide. . . ."
