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How Everything Is Made on Instagram: "Japan’s self-heating bentos and hot pots work thanks to a simple but powerful exothermic chemical reaction built right into the package. The heat doesn’t come from the food — it comes from the tray underneath it. Here’s how it works: 🔧 1. The Heat Pack Inside the base tray is a sealed heating pad made of quicklime (calcium oxide) or sometimes magnesium alloy, plus salt and other minerals. 💧 2. Add Water = Instant Reaction When you pull the string or pour w
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Shop using a bento box as a thermal cooker

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$22.98
Nifogo Electric Lunch Box For Adults 80W 1.8L, Faster Heated Lunch Box For Men, Portable Electric Lunch Boxes Food Heater 12V/24V/110V Heating
Amazon.com
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