How to choose a thermos when traveling?

1, the cup mouth is round, and the smell of plastic fittings is small. The first thing to buy a thermos cup is to look at the appearance of the cup, whether the surface and inner container are polished evenly, whether there are scratches, whether the cup mouth is round, whether the welding place is smooth, etc. Try unscrewing the lid of the cup. Only those that can closely fit with the cup body are qualified.

2. After pouring hot water, the cup body is not hot. To test the thermal insulation of the thermos cup, you can pour boiling water into the cup, tighten the bottle cap, let it stand for 2-3 minutes, and touch the cup body with your hands. It has good thermal insulation performance and does not need heating. When heating water, be careful not to fill it too full, so as not to burn yourself when unscrewing it.

3. Turn it over for 3 minutes to test the tightness. After adding water to the cup, tighten the bottle cap and turn it upside down for 3 minutes, or shake it a few times. If the lid of the cup is not twisted open but water seeps out, it means that the sealing effect is not good.

The heavier the material, the better. When buying, weigh by hand. Relatively speaking, heavier stainless steel thermos cups are better.

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