Ceramics are high temperature resistant materials! Under normal circumstances, there will be no problem! However, making the temperature difference of the cup drastic in an instant will cause the cup body to crack! Heat expands and cold contracts, the cup was originally cold, and after pouring hot water, it expands, so it cracks. In the winter, the porcelain cup has just been washed with cold water, and the water is heated, or the porcelain cup is put in the refrigerator, and the water is heated as soon as it is taken out.
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1, before pouring hot water, pour a small amount of hot water to wash the cup, so that it is not so easy to crack.
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2. Do not flush the cup with cold water when it is very hot.
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3, when the cup is cold, especially in winter, do not inject boiling water.