Glass cups can break with hot water due to thermal shock. When you pour hot water into a cold glass cup, the sudden temperature change can cause the glass to expand and contract rapidly, leading to cracks or even breakage. Glass is a poor conductor of heat, so it can't handle sudden temperature changes very well. Therefore, it's essential to take precautions to prevent thermal shock and ensure that your glass cups remain intact.

If the inside and outside of the cup are heated at the same time in advance and then hot water is poured into the cup, the degree of expansion inside and outside the cup is not so different, and it will not burst.

However, if the glass is very thin, even if hot water is poured into it, the heat will quickly spread to the outside, so that the inside and outside expand at the same time, and the glass is not easy to crack.

In addition, the so-called hard glass and heat-resistant glass are not easy to crack because of the small expansion ratio.

Anti-explosion method

Anti-explosion methods for glass cups typically involve using heat-resistant materials and taking steps to prevent sudden temperature changes. One effective method is to choose heat-resistant glass cups made of materials that have a large coefficient of thermal expansion. These cups are designed to handle high temperatures without cracking or breaking.

1)High borosilicate glass

It is a kind of special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high transmittance and high chemical stability. Because of its excellent performance, it is widely used in solar energy, chemical industry, pharmaceutical packaging, electric light source, handicrafts and other industries. Its good performance has been widely recognized by all walks of life in the world, especially in the field of solar energy, which has been widely promoted in developed countries such as Germany and the United States.

2)Tempered glass

In fact, toughened glass is a kind of pre-stressed glass. In order to improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the surface of glass. When the glass bears external force, it first counteracts the surface stress, thus improving the bearing capacity, enhancing the glass's own wind pressure resistance, heat resistance, impact and so on.

Another method is to preheat the glass cup before adding hot water. You can do this by rinsing the cup with hot water or even boiling it in water for a few minutes. This will help to gradually increase the temperature of the glass and prevent sudden temperature changes that can cause thermal shock.

Additionally, you can use a metal spoon or stirrer to help distribute the heat from the hot water and prevent it from coming into direct contact with the glass. This can help to reduce the risk of sudden temperature changes and prevent the glass from cracking or breaking.

CENGLASS Glass is a reputable manufacturer and wholesaler of glassware, which can provide you with high-quality products that are safe and durable. If you need, please contact us.