Why is it not suitable to hold high temperature liquid in the stainless steel straw cup?

People are accustomed to using stainless steel cups for high-temperature liquids, whether it is water, coffee or tea. But the stainless steel water cup with straw function cannot hold high-temperature liquid. Why can't it contain high-temperature liquid?

There are mainly two reasons.

Stainless steel water cups, especially stainless steel double-layer insulation cups, cannot be used to sense the temperature of the liquid in the cup from the outside. If the lid of the cup is changed to a straw structure, people cannot judge the temperature of the liquid in the cup in time during use, and it is very easy to cause burns when drinking, especially when driving.

If such an accident occurs, it will cause other irreparable major accidents.

The second reason is that the lid is changed to a stainless steel double-layer insulated cup with a straw structure. If the cup contains high-temperature liquid, the pressure of the high-temperature liquid in the cup will increase. At the moment when the lid is opened, the pressure-released high-temperature liquid sprays outwards and may cause burns to the user.

It is recommended that when using a straw thermos cup, the internal liquid temperature should not exceed 50°C, to prevent the air in the cup from heating up and expanding, causing the liquid to spray after shaking.

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