Thermos
The article will tell you everything you need to know about the thermos. If you are interested in how to make a cork yourself, its structure and principle of operation, as well as other interesting details, then this article is for you!
What is a thermos
A thermos is a special type of container designed to maintain the temperature of the liquid in it for a long time. This type of cookware is suitable for preparing special foods and cereals.
What year did it appear?
Appeared originally as a Dewar flask in 1892. And already in 1903, Reinold Burger improved the vessel by adding a lid to it, making a metal body and a lid. Therefore, 1903 is considered the year of invention. It was this year that Burger received a patent for a thermos, since many changes were made to it from the first version of such dishes.
How to check a thermos when purchasing
Initially, it is worth carrying out a visual check - the surface should be free of roughness, scratches and other defects. Also, there should be no unpleasant chemical smell. High-quality steel has no odor. The thermos needs to be shaken and checked for noise; there should be none.
What can you make from an old thermos?
A thermos is a practical thing that can be used even after it has served its purpose. First, you can make an ashtray or candy bowl.
Even from the smallest vessel you can make a bucket for flowers or the like.All items that come out of an old thermos can have a cylindrical shape. You can also store water in it.
How does a thermos work?
The main element is a flask, which at the end of the 19th century was called a Dewar flask. Made from glass or stainless steel. And also, it has a metal body. Air is pumped out between the body and the flask and a vacuum is created to reduce thermal conductivity. In addition to these elements, there is also a stopper and a glass lid.
How it works and what it consists of
The processes of convection and thermal conductivity practically do not work in thermoses. It has a mirror surface inside so that the radiation is returned using a reflection mechanism.
A thermos consists of a flask - the part where food is stored. The flask has a neck and a stopper, and the vessel itself is closed with a lid.
On top of the flask there is a body, which does not adhere to the surface of the flask, but is located at some distance and has a larger volume than the flask.
How does a wide-neck cork work?
The stopper for a thermos with a wide lid is larger in size. Modern stoppers are made of metal and resemble the shape of a flattened mushroom.
Conventionally, it can be divided into 2 parts: one is inserted inside the flask, and the second part, wider, is located on top and prevents spills and air flows.
Types of thermoses
The same thermos is not suitable for carrying both coffee and soup, for example. Thermoses for drinks have a narrow neck, but a wide neck is more common in food bottles. Food thermoses allow you to store both soups and side dishes.
There are also universal ones, with an additional narrow neck. Thermos with containers - used for food, differs in that it holds 2-3 separate containers.The thermal mug is used for drinks; it is convenient to take on hikes or simply use at home or at work.
What can a cork be made from?
When the old plug wears out, a new one can be made from foam or wood.
Before use, such plugs must be thoroughly disinfected.
How to make a stopper for a thermos with your own hands
The most suitable option is to make a plug from ordinary polystyrene foam. From a piece of foam plastic you need to cut out an element of the required diameter and size.
Such material is not deformed, but if the container pushes out such a plug with hot air, you can pierce the middle with a syringe needle. To prevent the foam from crumbling, it must be wrapped in cling film.
Conclusion
Thermos is the most suitable dishware for long trips or hikes. They are able to maintain the temperature of a drink or food; if a thermos is no longer used for such purposes, then you can use it to make something useful for your home.
