What's the matter with the newly-purchased thermos cup? Is there a problem with the quality of the vacuum flask? In fact, it's not all thermos cups that have such problems are quality problems. The correct use of the thermos cup for the first time has a great relationship with the insulation effect of the thermos cup in the future. If it is used incorrectly for the first time, it will have a great impact on the insulation effect of the vacuum flask. So how should this newly bought cup be used correctly?

First of all, after disassembling, it is best to use boiling water first, or add some detergent to scald several times for high temperature disinfection. Before use, in order to have a good insulation effect, it is best to preheat it with boiling water or cold water or let it cool for about 10 minutes. The first time you add water to the thermos cup should not be too full, so as to avoid the boiling water overflowing and scalding when the cup lid is tightened. The first time you use a thermos cup, its insulation performance is definitely very good, so be careful when using a thermos cup to drink hot drinks, and don't make a mistake in judgment and burn.

For some carbonated beverages such as milk, dairy products and fruit juices, it is not advisable to store them in the thermos for a long time. This will affect the drink back and forth, and will damage the thermos. After the thermos is used, it must be cleaned in time. It is best to use a soft cloth and a food cleaner diluted with warm water to clean it.

The inside of the stainless steel vacuum flask may sometimes have some red rust spots due to iron and other substances in the contents. At this time, it can be soaked in warm water with salt or diluted vinegar for a period of time, and then rinsed with boiling water. If you want to make tea regularly (2-3 days) to clean the tea stains, wipe with salt or toothpaste.