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A thermos is only good because of the material it is made with. A thicker material will keep whatever is inside cold or warm longer.

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Related Questions

Why does thermos bottles advertised as good for 24 hours while others are claimed to be able to keep liquids hot or cold for 48 hours?

The claim of 24 hours versus 48 hours typically depends on the insulation quality and thickness of the materials used in the thermos bottle. Thicker insulation and higher-quality materials can help a bottle retain temperature for a longer period. Different designs and technologies might also impact how long a bottle can keep liquids hot or cold.


Is a thermos flask also good for keeping water cold for several hours?

Yes. The thermos flask can reduce the amount of heat travelling from the surroundings to the cold water


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.


Can you keep a thermos in the fridge?

I wouldn't see any reason why you couldn't keep a thermos in the refrigerator. Pre-chilling containers for cold beverages is a good idea anyway. ====== ======


Is using a thermos bowl for a kids lunch safe for them to eat if the food is out for 5 hours?

That depends on how good the thermos bowl is at holding hot or cold temperatures. It also depends on the ambient temperature where the filled bowl is stored. Using a thermometer, try testing it out at home to see if it holds the food properly for that period of time.


What are some good insulators for a thermos?

spongespaper towelglassduck tapesawdustmetals...these are excellent insulators.....


What is a heat-resitant container?

it is a thermos. It stores heat and Coldness. That is if you get a good one.


What is a good slogan for a thermos called heat saver?

Save the heat in heat saver the only thermos that saves all the heat put into it Save heat with heat saver


are reusable water bottles good for the environment?

You really should avoid reuse of plastic water bottles, due to the fact that they weren't constructed for long time use and might leech out material into the water. Instead, you should use a thermos or other item intended for long term use for your water needs.


How do you make a thermos without a vacuum that prevents heat?

Insulate the thermos with a very low heat-conducting material. Low density objects such as ceramic or foam are typically good insulators.


What is a better material to use in a thermos flask?

Stainless steel is a popular material for thermos flasks because it is durable, has good insulating properties, and is easy to clean. Vacuum-insulated stainless steel thermos flasks can keep liquids hot or cold for long periods of time.


How does a thermos keep things hot?

A thermos has another container indise the plastic or metal coating made of glass. This container is really like one bottle inside of another bottle and sealed at the ends by melting the edges together. The air is taken out from the space between the two bottles to produce a vacuum, which isn't a good conductor of heat and does a good job at slowing down the movement of heat. To slow down the other heat they coat the facing surfaces of the glass bottles with a silvery coating. This reflects the heat and helps slow down any losses that might get that way. They use a material like cork or rubber to make the bottle stopper and anything else that might touch the outside surface of the glass container. These materials are bad conductors of heat and slow down the heat loss. What's left is what we can see which can be metal or plastic and is the covering for the glass bottles. The idea here (with the thermos) is to slow down the movement of heat from one place to the other. So if you have hot stuff in the thermos or cold stuff in the thermos, the end result is the same. Keep heat from moving to where you don't want it to go for as long as possible. It was invented in1892 by Sir James Dewar.