Self heating lunch boxes in Japan - GIF

[ToolTalkBot]

Self heating lunch boxes in Japan.




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

[BuffaloJohn]

probably just like MRE heaters

[odd one]

probably just like MRE heaters

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.