In my Greater China, the phrase drinking more hot water has been deeply engraved in everyone's DNA, no matter what age group of people, the probability is that they will not escape the curse of drinking hot water. And if you want to keep the water in your hand in high-temperature hot mouth mode anytime and anywhere, you have to mention our circle god - thermos cup. Now the price difference of thermos cups on the market is too large, many people say what is the difference between this thing?
Some people asked, is the thermos cup, who doesn't seem to have it, dozens of dollars can grab a handful on the street! Some people say, "Can it be used if it's too cheap?" Especially the elderly and children at home use it a lot, then you don't buy it blindly,
It must be more expensive and more secure." But a little brand is often hundreds of pieces, and in this era of intelligent everything, merchants also take off their pants and fart like to add a display temperature, that water is not hot we know this little mouth, are redundant! So the question is, is hundreds of thermos cups worth the price? Is it an IQ tax? How to choose so as not to step on the thunder? What does a thermos cup that is noble enough and can always "burn your mouth" look like? Let's interpret it today.
First of all, let's talk about the answer, let's buy 304 stainless steel liner on the line, when you choose, you will take the thermos cup back and forth, find 304 these three numbers, generally dozens of dollars, like 316 stainless steel liner and titanium alloy, this belongs to the local tyrant level, hundreds or thousands, 216 stainless steel inner tank, that is to eat do not use this broken thing, hot water in and poisonous water out.
If you haven't crossed out here, I'm going to dig into the bottom of it!
First of all, dig the birth and principle of the thermos flask: this thing was originally extended from the principle of the thermos flask, people in order to be more convenient to carry and preserve hot water, they began to work on its volume and inner tank selection, at that time, the inside of the thermos flask was a double-glazed inner tank, the outside was wrapped in plastic or iron, the laminated glass was plated with a layer of silver, and the bottle mouth was closed with a wooden stopper, which is the "mini miniature version" of the thermos flask.
Its principle of action is also very simple, there are 3 ways of heat transfer, namely heat conduction, heat convection and heat radiation. By extracting the middle of the double-glazed structure into a vacuum, heat conduction can be effectively reduced; At the same time, the glass liner is plugged with a wooden plug, and the heat convection can be reduced after pouring hot water, and the silver plating between the double glass of the inner tank can reflect the heat radiation in the bottle back, and the thermal insulation effect is barbaric through the perfect control of these three heat transfer methods.
Later, with the development of the process, in order to be more safe and durable, the fragile and unsafe glass liner was gradually eliminated and replaced with stainless steel, with its own advantages and disadvantages.
At present, the inner tank of the thermos flask on the market is mainly divided into 201, 304 steel, 316 steel and titanium alloy.
When it comes to 201 insulation liners, I believe everyone is "familiar" and hateful, why? In 2018, CCTV news exposed the famous "thermos cup killing incident", which shocked the society for a while.
And the bane that "can allow" hot water in and poisonous water out is the 201 stainless steel inner tank.
In order to reduce costs, some unscrupulous merchants in the market use 201 stainless steel to make inner tanks for sale, which is shoddy! This thing metal manganese content is extremely high, and poor corrosion resistance, is not long-term contact with food and beverages, if you use the material for a long time to place acid, it may quickly lead to manganese precipitation in a short time, excessive manganese is extremely harmful to the human nervous system, if you drink this water for a long time, the consequences are simply unimaginable!
And 304 stainless steel is considered to be food-grade material, most of the qualified stainless steel insulation inner tank on the market is made of it, it can be said to be quite able to play the player level, it itself contains 18% chromium and 8% nickel, making it more corrosion-resistant, temperature resistance can also reach 800 degrees Celsius, safe and harmless to the human body, can meet the daily thermos cup and other contact food level performance needs.
Compared with 304, 316 stainless steel is an advanced version, which adds molybdenum on the basis of 304 stainless steel, so overall than 304 corrosion resistance and high temperature strength are better, especially acid resistance, that excellent is really not a little. This also makes it directly leap to medical grade stainless steel, and it is indispensable in many high-precision fields such as medical equipment and chemicals.
And if 316 is an advanced version, then titanium alloy is basically the "ceiling" material in the inner tank of the thermos cup, a proper "noble and noble".
It belongs to a high-strength, low-density and highly corrosion-resistant metal material, in all aspects can easily beat 316, not only hot water put out a day is still hot mouth, but also can easily hold a variety of juices, drinks and tea, 24 hours of heat preservation and cold insulation insurance, this guy, who can bear not chopping hands after listening? But some people said, if it is really so strong in all aspects, then why did it not "fire" and did not promote sales on a large scale?
The answer is actually very poignant, because although the material "can hit", but the price makes many people feel "difficult", a thermos cup made of titanium alloy is cheap 5, 600 yuan, not to mention the more expensive, not to sell a 3, 4 thousand that is too soft for the business.
Speaking of this, in fact, there are many thermos cups that keep up with the times, sitting on the "intelligent" new car, such as Xiaomi, Apple and other large manufacturers are also eager to enter the market to grab cakes, often hundreds or thousands of yuan, but at present, they have not splashed too much. It is mainly related to the generally high price.
Don't ask, just can't afford to ask!
In fact, in general, the thermos cup is originally an affordable and people-friendly product, it is enough to achieve the purpose of heat preservation under the premise of ensuring safety, there is no need to be more expensive the better, as long as the quality is guaranteed, 4, 50 yuan is still safe to use. When choosing a thermos cup, you should choose at least 304 level, the safety is guaranteed, the overall cost performance is higher, and it is completely enough for daily use. Of course, if there are conditions, 316, titanium alloy inner tank is of course better.
It should be noted that when choosing a thermos cup, you must pay more attention to whether the inner tank has the words SUS304 and SUS316 to ensure the safety of the material. At the same time, you should also carefully check whether there is a peculiar smell, light is not smooth, whether there are burrs, rust and other signs inside, if there is, then don't choose, who buys who is deceived! If you are really worried about your bad choice, then don't think too much, go directly to a regular store or large supermarket to buy, consult the supermarket personnel for the specific material, basically you will not go wrong.