[China Glass Net] Generally, the water is poured into the glass. The thicker glass is more prone to bursting of the cup. Because the glass is cool, when poured into hot water, the inner wall will expand rapidly due to thermal expansion and contraction; but since the glass is a poor conductor of heat, if the wall is thick, the temperature will not spread to the outer wall very quickly, so Causes the inner wall to expand; but the outer wall remains in its original state, so the explosion of the glass is broken.
The thinner the cup, the faster the heat conduction when pouring hot water, the smaller the temperature difference between the inner and outer walls, and the smaller the deformation between the inner and outer walls, so it is not easy to break. If you pour slowly and a small amount of boiling water and shake the cup at the same time to evenly heat the inside and outside of the cup, you can better avoid the crack.
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