How to avoid  bursting of glass cup when you pour too cold or hot beverage/water

The reason for bursting of glass cup is expanding suddenly of glass inner wall when you pour hot water,but the outer wall still keep the same situation. So the inner wall will squeeze outside suddenly, then the glass cup is burst.

How to avoid the bursting of drinking cup ?  Let's learn below.

1. Put the new glass cup into the bowl , and submerge in water. Boil the water and take glass cup out after  the water ran cold.  Therefore, the glass cup will not burst because of too hot or cold suddenly.

2. Pouring the hot water , you can take one metal object such as cooper fork, aluminum spoon and so on. 

3. We should pour hot water slowly into the middle of glass cup. Because the bottom of glass is more thicker than glass wall .


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