Ordinary glass cups cannot be used in ovens or microwaves. The heat resistance of ordinary glass cups is not particularly good, and the temperature difference they can withstand is only about 60 degrees Celsius. Whether it is urgent heating or urgent cooling, it may cause the glass to burst. So general glass cups should not be placed in the microwave oven to heat tempered glass that has not been homogenized. If used in an oven or microwave, there is a risk of self explosion and personal injury. Tempered glass is not directly placed in the microwave for heating because it contains metal components that are fragile when heated. On the other hand, when heated, toxins may precipitate, which is harmful to health. Heat resistant glass cups can be placed in the microwave for heating. Compared with the clamshell glass and actinide glass cup, the heat-resistant glass cup has a small expansion coefficient and good high-temperature resistance characteristics. At the same time, it can withstand changes in extreme cold and heat, so it can also be placed in the oven. So if you want to heat milk and other drinks, you can pour them into a heat-resistant glass cup and then put them in microwave heating specialized glassware. Currently, there are some specialized glassware on the market that can be microwave heated, most of which are lunch boxes, and they often have a special label at the bottom indicating that microwaves are available. At the same time, heat-resistant glass products are obtained through annealing and cooling, and their thermal stability is good. When consumers choose and purchase products that are labeled as heat-resistant glass but have a very low price, they should consider their authenticity