Salt-cooled portable fridge
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Teens Win 2025 Earth Prize for Refrigerator That Runs on Salt–200 Headed to Hospitals for Chilling Medicine

72% Informative
The Thermavault is a portable fridge that cools down passively as salts dissolve in water.
It can keep vaccines, transplant organs, transplants, and other medical supplies cool.
The invention won them the 2025 Earth Prize, which came with a $ 12,500 reward.
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