the.com/thermos
a flask so good at keeping secrets your soup stays mysterious until lunch
means A thermos is an insulated container that keeps hot drinks hot and cold drinks cold by trapping a vacuum between its walls.
from From the Greek 'thermos,' meaning 'hot' — the same root that warms up 'thermometer' and 'thermal.' It began as a brand name: the Thermos company sold these vacuum flasks so successfully that the trademark dissolved into the common word, a fate (called genericization) it shares with aspirin and zipper. The vacuum-flask technology itself was invented by the physicist James Dewar, who never patented it — so the cleverer marketers ran off with the name.
- vacuum trick
- Empty space between walls blocks heat from escaping
- name origin
- From Greek thermos, meaning hot
- genericized
- Trademark lost; now anyone's vacuum flask
- invented 1892
- James Dewar built it for cold science, not coffee
- either way
- Keeps hot hot and cold cold, simultaneously
stanley thermos — invented by william stanley in 1913, still the most iconic vacuum bottle brand
aladdin thermos — competitor brand launched in 1908, known for iconic plaid patterns and lunch box thermoses