Self heating lunch boxes in Japan - GIF

Self heating lunch boxes in Japan.

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Previously:

Japanese wooden vending machine - photo
Pedal-powered Japanese roller coaster - GIF
Striking a Japanese temple bell - GIF
Traditional Japanese house joinery - GIF and video
WW2 Imperial Japanese Navy carrier operations - GIF
WW2 Japanese midget submarine - photo
Woodburning a Japanese harp body - GIF

probably just like MRE heaters

Quote:

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Originally Posted by BuffaloJohn

probably just like MRE heaters

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Similar. I would probably put something under it or there is going to be a square mark on that table. I know a guy that owns part of a patent for a self-cooling beverage can. Do not know if it will ever see production, but not needing a cooler would be neat in some situations.