How long can you not drink water in a cup?

There will definitely be this situation in life: whether it is the mineral water you buy or the water in the cup, there will be the problem of drinking it until the next day, some people will choose to pour it out and get a new one, and most people will choose to drink this overnight water.

But the bottled water in the water dispenser will not choose to be poured out, sometimes drink it for a week or even a month, so why say that the bottled water is fine for a week, but the water in the cup may be sick if you drink it until the next day? Let's take a look.

Why do you say that bottled water is fine for a week? And the water in the cup can't be drunk overnight?

Overall, the biggest difference between the two is that there is no or very little presence of other microorganisms such as bacteria in the bottled water, and the water in the cup usually has a lot of bacteria.

As we all know, summer is hot and dry, and whether it is food or fruit, you can't eat it overnight, because it's either searched, or sour, and you can't eat it at all.

The same is true for water, there are more mosquitoes, flies, and flying insects in summer, and sometimes you will find that there will be a fly or other flying insect in the cup, so everyone will pour out the water, and they will definitely not drink it.

However, if you don't find that there are these little flying insects in it, it is too hot, you want to drink water, and the water taken out of the thermos is too hot, you will choose the water that you didn't drink last night and continue to drink it into your stomach, but the bacteria and eggs that you don't notice when the flying insects fly will enter the abdomen together, which will cause physical discomfort and bring a lot of harm.

The question of how long the water in the cup should not be drunk is not too dogmatic, remember one thing: the fresher the water, the faster the better! The freshness of the water depends on the cleanliness and tightness of the container, the microbial content in the water, for example, boiled water is contained in a thermos, bacteria can hardly grow, and it is no problem to leave it for 2 days; However, if it is placed in a glass without a lid, it is not recommended to drink it after 1 day.

In the same way, as long as the lid of bottled drinking water is not opened, the shelf life is 12 months; Once the lid is opened, the shelf life is only 1 day.

Try not to drink boiled water for 24 hours, the nitrite content of boiled water for more than 24 hours will increase significantly, and excessive nitrite will cause cancer. Try not to drink the bottled water of the water dispenser for 7 or 10 days, even if it is a good quality bottled drinking water, it is easy to breed bacteria if it is placed for too long after opening, try not to drink it again for 7 days when the temperature is high, and do not drink it again for 10 days when the temperature is low, and you must pay more attention to avoid causing bacterial diarrhea.

Don't drink the water in the cup after 24 hours, because if the water in the cup is left for a long time, it will deteriorate and grow bacteria, and drinking it is not good for the body and affects your health. If you are in a special environment and you really don't have water to drink, you can also drink some, as long as you don't drink it often, it won't hurt much.

The water in the cup is usually drunk on the same day, not more than 24 hours. Of course, 24 hours of cold boiled water will not deteriorate, but leaving it for a long time will increase the chance of pollution, so it is better to drink the cup of water on the same day.

How long has the water in the cup been left undrinkable, generally speaking, the water in the cup has been left for too long, more than 24 hours, I try not to drink it.

Disease analysis: boiled water is generally stored for about three days to avoid taking, long-term storage will cause the formation of nitrite acid, easy to cause vomiting or nausea and other adverse reactions after ingestion, but also lead to an increase in the risk of cancer. For example, esophageal cancer or liver cancer may also induce colon cancer or stomach cancer, and there will be the growth of viruses or bacteria, which can easily cause intestinal lesions.

You can't drink the hot water in the cup for a long time, and in terms of hygiene standards, don't drink it the next day, but there is no problem. But if the water on the third and fourth days is not recommended to drink, it is not good for the body.

If the boiled water is left overnight, it can still be drunk. But the premise is that the thermos cup is covered with a lid, which is in a closed state, if it is open, not airtight, and in contact with the air, there may be some mosquitoes flying into it to lay eggs, of course, this possibility is not large. Therefore, if you leave it overnight, you can observe the bottom of the cup, whether there are granular dots, if there is something similar, don't drink it, if there are no other impurities, and you are more thirsty, you can drink.

Of course, it's best to re-boil the water to drink, so as not to make yourself unwell because of this water!

Generally, it's okay to drink it for two days, but many people don't drink overnight water, this still depends on personal habits, and it's actually nothing to put it for two days.

The water in the cup was separated by two days. Because it's been a long time, you can't swallow it.

Actually, this question doesn't have to be too dogmatic, remember one thing: the fresher the water, the faster you drink, the better! The freshness of the water depends on the cleanliness and tightness of the container, the microbial content in the water, for example, boiled water is contained in a thermos, bacteria can hardly grow, and it is no problem to leave it for 2 days; However, if it is placed in a glass without a lid, it is not recommended to drink it after 1 day.

In the same way, bottled drinking water has an expiration date as long as the lid is not opened.

is 12 months; Once the lid is opened, the shelf life is only 1 day. 

How long does the overnight water in the thermos cup last.

Pouring boiling water at night in the thermos cup may not be able to drink it that night, the next day the water will become overnight water, overnight water in a sealed state is best drunk the next day, to the third day after it is not recommended to drink, although the boiling water has been sterilized at high temperature, but the overnight water will be in contact with the air, after two nights will produce a large number of microorganisms, easy to produce nitrite.

Therefore, it is not recommended to drink it after more than three days. 

Can you drink water overnight?

Original web text: The shelf life of a glass of water is only 16 hours, and the total number of bacteria in overnight boiled water is higher than that in tap water.

According to experimental data, after boiling boiled water, after being placed in the air for 16 hours, the total number of E. coli will seriously exceed the standard, so the boiled water has a 16-hour shelf life from the moment after boiling for 3 minutes and turning off the fire.

Experts agree with the claim that water has a shelf life, but feel that "16 hours" has no scientific basis.

Experts said that water has a shelf life, in fact, it is easy to understand, drinking raw water is easy to diarrhea, because there will be various microorganisms and bacteria in the water, and after high temperature boiling, these microorganisms and bacteria cannot survive and are killed.

However, in the process of boiling water to cool down, the temperature is just right for microorganisms and bacteria to multiply, and the longer it takes time, the more it will multiply, just like a basin of water outside, it will deteriorate after a long time.

How long it will take to spoil and it will not be suitable for drinking, in fact, there is no fixed time, because it is also affected by the objective environment. For example, the temperature, in the summer, the temperature exceeds 30 degrees Celsius, and the air humidity.

It is also high, the bacteria multiply quickly, and it is easy to be contaminated and cause diarrhea. 

Therefore, it is best not to drink overnight water in summer, and it is best to put overnight water in winter in a covered cup, and then mix boiling water with warm water the next morning.

Expert advice: cool and white.

The storage time should not be too long, and the boiling water boiled on the same day should be drunk on the same day.

Experts believe that the shelf life of boiled water circulating on the Internet in the air is only 16 hours, which is only the personal opinion of netizens, and there are no relevant experiments and data to prove it, but boiled water should not be left for too long, even if there is no shelf life, it is best not to drink boiled water after several days.

It is best to drink cool boiled water within 16 hours, because when the water temperature drops below 60 degrees, it is very suitable for bacteria to grow and multiply. Although boiled water is water that has undergone a high-temperature sterilization process, it is advisable to drink it as soon as possible.

After 16 hours in the air, the number of coliform bacteria will begin to increase gradually, mainly due to the water surface of the plain water will be in contact with the bacteria flowing in the air, and even will be invaded by bacteria, so if the open is placed in the air, the bacteria will be pervasive, and these bacteria will also breed other substances, once the human body inhales this substance, it will have symptoms such as hypoxia and nausea.

Normally, if it is a cup with a lid, the water in it can generally be drunk within 12 hours, but if there is no lid, after more than two or three hours, you will have to replace it.

The water in the cup cannot be drunk for more than 24 hours, and the 24-hour standstill, coupled with the formation of some dust in the air and some microorganisms, has changed the quality of the water.

In fact, you can drink the water in the cup for as long as you want, and if you are afraid of pollution, you can change the water to a new one day without having to drink the old water.

If you put some water in the cup and leave it for 12 hours, you can eat and drink, because the water can be quickly cleaned within 12 hours.

In general, do not drink again overnight.

It's best not to drink it for a day and a night.

After buying a new cup home, it is recommended to blanch it in boiling water for more than 20 minutes, and if it is a glass, you need to be careful when soaking it in boiling water to avoid bursting

There are many materials for water cups in life, common ones are plastic and glass, and plastic cups are scalded with boiling water, which can have a good sterilization and disinfection effect.

Because of the material, the glass is easy to burst after being scalded by hot water, so you can slowly pour boiling water along the wall of the cup, and pour a large amount of boiling water after fully preheating. You can also put the glass in salted water, and it is okay to boil over low heat, it should be noted that the cup needs to be cooled naturally after being taken out before use.

Instructions for cup selection

1. Glass: practical, safe and anti-explosion.

The first choice for drinking water glasses should be glasses, especially for office and home users. The glass is not only transparent and beautiful, but among all the materials of the cup, the glass is the healthiest and safer.

2. Stainless steel cups: do not contain acidic drinks.

The benefits of stainless steel cups are that they are durable, rust-resistant, and corrosion-resistant. However, stainless steel cups are alloy products, which contain more heavy metal substances, such as nickel, chromium, manganese, etc., if used improperly, these heavy metal substances are easy to be released, endangering health.

Therefore, in daily use, it is necessary to be careful not to use stainless steel cups for acidic drinks, such as juice, coffee, carbonated drinks, etc.; It is also not allowed to hold soy sauce, vinegar, vegetable soup, tea, etc. for a long time, because the electrolytes in these foods may react chemically with the heavy metal substances in stainless steel, resulting in the precipitation of heavy metal substances.

3. Enamel cups: they should be eliminated decisively after being damaged.

Enamel tumblers are also a good choice. Enamel is a composite material that solidifies inorganic glass materials on metal after thousands of degrees of melting. Enamel coating on the metal surface can prevent rust, so that the metal will not form an oxide layer on the surface when heated, and can resist the erosion of various liquids.

If it's a glass and porcelain cup. You should put a cup in salted cold water, slowly heat it to boiling water, and boil it for ten minutes. 2. If it is a plastic cup, it depends on what material.

If it is PC or just right, you can put it in salted water and boil it. If it is a substandard material, it should be soaked in cold salt water for 40 minutes, and if there is still a peculiar smell, it is recommended to replace a cup.

After a long time, brush the thermos cup clean, pour in the freshly boiled water and put it for a few hours, if it is still warm, it can still be used.

The thermal insulation principle of the thermos cup mainly lies in the vacuum layer, and the vacuum layer of the thermos cup is relatively easy to damage, so try not to put it in a higher place when storing the thermos cup, so as not to accidentally touch it in the future, if it falls, it is likely to cause the vacuum layer of the thermos cup to crack, so that the thermos cup is no longer insulated.

1. Because the thermos cup has a thermal insulation effect, especially some of the best thermos cups have a particularly good thermal insulation effect, if the very hot boiling water is put in, it is still very hot boiling water when it is poured out, so the thermos cup is used to prevent scalding.

2. It is recommended not to use a thermos cup to fill the soup with greasy liquids, and if the soup is not cleaned in time, there will be a very serious oily smell, and it is difficult to remove the greasy smell no matter what method is used to remove it.

3. Do not use steel wire and other things to clean the thermos cup, it will damage the cup body inside the thermos cup and affect the heat preservation effect, so do not use the thermos cup to install some difficult things to clean.

4. Pay special attention when using the thermos cup, do not drop the thermos cup from a very high place, hold it firmly when you take it, it is easy to break the lid of the thermos cup if you are not careful, or the cup body is deformed.

The general thermos cup can be used, but it also depends on the specific situation:

Generally, there is no problem with the steel or glass thermos cup for a few years, and there is no problem with the steel thermos cup as long as it does not rust. The life of the glass will be longer, for a few years, more than a dozen years or even decades. Wipe clean with hot water before serving.

If it is a composite material or PE, you should pay attention to see which grade of material it belongs to, this material has a certain aging life, and it is best not to use it, it should be close to aging or similar materials after aging will release different degrees of harmful substances, which is not good for health.