You can also fill the thermos with ice and water. Put the lid on. Let it sit for a few minutes to cool then pour out the water. To keep your food cold, pack your thermos just before leaving home. Warm your thermos by filling it with boiling water. Let it sit for a few minutes then pour out the water. It has an inside container that holds your coffee or any drink you want to keep hot and an outside container that surrounds the inside container.
The outside container does not touch the inner container except in some places and the gap between these two containers is the vacuum space. A standard thermos can keep your coffee hot for approximately 24 hours and it differs from one thermos to another depending on the substances and technology used in making those thermoses.
There seem to be no instructions by the thermos companies whether you should keep your thermos in the fridge or not. You can put an insulated coffee thermos in the fridge or a refrigerator. People often confuse between which things to store in the fridge and which things to store in the freezer. As the temperature in the freezer is very low, the coffee inside the thermos freezes.
After few hours, the frozen coffee can expand and break the vacuum seal of the thermos. Thus, it might damage the insulating properties of your thermos flask. Recommended Articles for You:. Hot coffee inside the insulated thermos will eventually cool down when kept in the refrigerator after few hours. But it will take more time to cool down as compared to when it is stored in a non-insulated bottle. Thermos vacuum acts as an insulator between the inner container of the thermos and the cold surrounding provided by the fridge.
This will extend the time of coffee to cool down in the thermos stored in your fridge. But due to cold temperature inside your fridge, eventually, your coffee will also be cold after few hours.
This time varies depending on several factors such as material quality of the thermos, storage technology used in the flask, the temperature of your fridge and actual temperature of your hot coffee. If you do not want to dilute your coffee, you can make some frozen coffee cubes in advance.
By adding these coffee cubes, you can chill your coffee quickly without diluting it. Keep your cream, milk, or sugar in the refrigerator and add them to your freshly brewed coffee. Pour your coffee in a thermos or bottle and keep it in the container which includes ice sprinkled with salt. I always remove mine.
Thanks for the great info. Thank you! Thank you so much for making this so easy for me! My son has swallowing issues and packing lunches can be difficult. I really appreciate the hard work you put into this by testing everything and sharing your info.
I have no doubt that you have saved me so much time, money and frustration!! I just got my son the 10oz funtainer. This week my husband is on a work trip, so I have to drop off my son earlier than usual. If I am putting his food in the container around and he eats around noon will it be safe? I have been using Thermos Foogo containers for years with good success.
To pre-heat the container, I add boiling water and screw on the lid while I heat the food. Just dump the water and refill with lunch and you will be goo to go! Any suggestions on how to pack a thermos in a lunch box with cold items, such as juice box or yogurt? Lisa from Days had a whole post about how pre-heating the thermos has no effect on how the food keeps its heat.
While I respect Lisa and her process very much, I was curious about this. I took the time to preheat and test the thermoses as shown. The temperature is clearly different.
To me, it is worth taking the minute to preheat. Have you continued to use the Stanley thermos with success? Most of the reviews I read said they only lasted a few weeks before the seal broke.
What has your experience been? The lid should be hand washed. I struggle with keeping foods other than soup above degrees from am to pm which is the time between when my sons lunch is packed and eaten.
Any further advice? I can only heat it to about a maximum of degrees without burning it before putting it in a thermos preheated with boiling water. Thanks so much for your thoughts. Rebecca, the foods we tested in our tests were heated in a microwave sorry! Thanks so much for your additional thoughts on keeping hot lunches hot and safe Laura. I too am most concerned about clean hands at lunch time.
To keep lunches hot I heat food really hot, like said above. I also put boiling water in the canister to heat the container. And remove it, just before adding the food. Thank you again.
Do you know of any rectangular container that can keep food warm? Something that the kids can open up and eat in like a small plate? I currently use a Thermos too but the mouth of the container is small.
Short of using 2 Thermoses, is there one that can keep 2 different foods warm while keeping them separate? My son does not like the sauce or meats mixed with the pasta or rice. I wish! Do you keep foods besides soups warm? Weird question but my daughter loves sauteed shrimp and asked if I could pack her some in her stainless thermos.
If the vacuum insulation fills up with air your Thermos will no longer work to keep things cold or hot for long periods of time. The reason people think you can't put it in the refrigerator is because Thermos as well as other brands tell you not to put them in the freezer.
However, they don't really tell you why you shouldn't put them in the freezer. But the fridge and freezer are very different and putting your thermos in the fridge is absolutely ok. I couldn't find very much information from Thermos about whether or not you can put their insulated flasks in the fridge.
Thermos' Care Intructions page makes no reference to either the fridge or the freezer and simply warns against scalding from hot drinks, whether or not you can put your Thermos in the dishwasher and if they can be microwaved. This means I needed to look to other brands to try and work out if this is ok and if it isn't why not?
Given that thermos flasks are designed to be used outside, and sometimes in extremely cold temperatures, I would assume that yes the fridge would be fine. It's not going to freeze your drinks and cause them to expand and it'll cool them down slowly over time so there is going to be no rapid change in temperature. It won't cool your drink down very quickly which we'll talk about next, but it shouldn't damage your bottle. See the latest price of Thermos Flasks at Amazon. Given the thermoses are designed to keep drinks cold then wouldn't it make sense to keep them in the fridge so they stay colder for longer?
Thermoses are able to keep drinks cold for so long because they are double walled with a layer of vacuum installation in between the inner and outer walls.
Heat struggles to pass through a vacuum and so this stops most heat transfer.
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