How the vacuum flask became a million dollar idea.
The BBC's Aaron Heslehurst explains how the vacuum flask became a best-selling product.
from BBC News - Business https://bbc.in/2ZR4du3
from BBC News - Business https://bbc.in/2ZR4du3
How the vacuum flask became a million dollar idea.
![How the vacuum flask became a million dollar idea.]()
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May 03, 2019
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