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A thermos is too old when it shows signs of wear and tear such as cracks, dents, or rust that may affect its ability to properly insulate and retain temperature. It is also advisable to replace a thermos if it has been used for an extended period of time and no longer maintains the desired level of thermal performance.

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Q: When is a thermos too old?
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Related questions

What Materials should you use to build a thermos?

no idea :( i need to know too


What are creative uses for a thermos?

use it on camping to store eggs or perishables (thermos' keep thing cool too)


What is the plural of thermos?

The plural of thermos is thermoses.


Does a thermos measures one quart or one gallon?

A thermos measures one quart because its too small to be one gallonand a gallon is equal to four quarts and when i looked at the picture of a thermos i guessed it was 1 quart.Hope you liked the answer p.s I'm in 3rd grade.


Where does the word thermos come from?

Thermos is from the Greek word 'thermos' meaning 'heat'.


What is inside a thermos?

inside a thermos is flask steel materials, it keeps the thermos for about 1 - 2 days.


What is the possessive form of thermos?

The possessive form for the noun thermos is thermos's.Example: I can't find the thermos's cap.


What is the capacity of thermos?

The capacity of a thermos is "qt.(quart)"


What is the best way to keep a thermos hot or cool?

To keep a thermos hot, pre-heat the thermos with boiling water before adding the hot liquid. For cold beverages, pre-chill the thermos with cold water or ice cubes. Keep the lid tightly closed to maintain the temperature inside.


Is a thermos good after 20 years?

Can be, if the vacuum is good. In glass thermos if the glass is not broken it is okay. In steel thermos if the vacuum has not been lost it will be. You can test a steel thermos by simply filling it with boiling water, if the outside of the thermos becomes hot the vacuum has been lost and one will need a new thermos.


How many millimeters is in a thermos?

About 70-200 mm Is In A Thermos


What is the plural for thermos?

"Thermos is a brand name (adjective) not a noun. Brand names are always used as an adjective so the correct usage in a sentence would be "I bought ten Thermos containers." or "The Thermos food containers are on sale at the store this week."