Inventions · Topic 69 of 112
The Thermos Flask
⭐ MasteredA thermos flask uses a double wall with a vacuum between the layers to keep drinks hot or cold for hours. Its design was invented in the late 1800s.
💡 Fun fact
The vacuum flask was invented by a scientist who was trying to store liquefied gases.
All about The Thermos Flask
A thermos flask keeps drinks hot or cold for hours. It has a double wall with a vacuum between the layers, which slows the movement of heat in or out. The flask was invented in the late 1800s by a scientist who was studying liquefied gases.
Thermos flasks are popular for picnics, camping and outdoor sports. Keeping the lid on tightly helps the flask stay effective.
🎮 Try it yourself!
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