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. ====== ======
This will depend upon the Thermos, but in general a thermos will keep hot liquids hotter for longer. This is because the Thermos has stronger insulating properties.
thermos cup
A thermos bottle (Actually a thermos container, which has a wider lid) will work.
Most times its because there is no air in between the outside layer of the thermos and the inside layer of the thermos.
Put the drinks in a thermos
Yes, it can also keep things cold.
Long Johns for pants thermos but I dont know what the shirts are called.
They kept the liquid nitrogen in a thermos so it stayed cold. They used a thermos of oil to keep the sodium from contacting air and water.
A thermos
To keep hot liquids hot and cold liquids cold by minimizing heat transfer between the inside of the thermos with the outside.
A thermos is a container that will keep beverages hot.
keep it in a hot place