The temperature in the stainless steel insulated cups will gradually drop over time and be at about 20 to 40℃, and the bacteria will begin to multiply. The rich protein in milk just provides a good nutrient for bacteria, making milk easy to be contaminated by bacteria and deteriorate. Bacteria multiply very quickly about every 20 minutes. Milk will spoil in three to four hours in a stainless steel insulated cup. It is easy to cause diarrhea, indigestion, or food poisoning if you drink spoiled milk. So milk should be drunk immediately after boiling, the rest of the milk should be stored in the refrigerator.
How long can you keep milk in a stainless steel insulated cup? If you must use a stainless steel insulated cup for milk, you can keep it for no more than an hour. The bacteria in an insulated cup can produce a new generation in about 20 minutes. After three to four hours, the milk will go bad. It is easy to cause nausea, vomiting and other uncomfortable symptoms when people drink this kind of milk.
Someone thinks stainless steel insulated sippy cup should not contain juice, especially acidic fruits such as lemon and mandarin orange, in case the inner wall is corroded. In fact, for small stainless steel thermos flask, as long as it is not a high concentration of strong acid, it will not cause damage to stainless steel. So even concentrated juice in a stainless steel thermos is fine. It should be noted that due to the high sweetness and high carbohydrate content of fruit juice, it is recommended to drink it fresh within 30 minutes after opening; or quickly into the refrigerator refrigerated storage, in order to prevent a large number of microbial, bacterial breeding and deterioration.
1. Ordinary thermos are stainless steel, so it is not recommended to pour some acidic juice into them. If you often do like this, you will cause damage to the cup's insulating liner.
2. It is not recommended to make tea in stainless steel insulated cups. Many people who like drinking tea like to make tea in thermos cup, and they think that a longer time of high temperature can make tea more fragrant. This is wrong, boiling tea for a long time will only cause the breakdown of trace elements in tea.
3. Do not soak Traditional Chinese Medicine in the stainless steel insulated cups. Acidic chemicals in drugs are easy to react with metals, thus affecting the efficacy of drugs.