The practical improvement brought by the large capacity design is immediately apparent. For small gatherings with friends or family enjoying tea together, there's no need to boil water and change pots repeatedly. One batch can brew enough for multiple people, saving considerable waiting time. The transparent body allows for complete observation of the tea leaves unfurling and the tea liquor developing its color, providing excellent visual appeal when brewing oolong tea, flowering tea, and health-promoting fruit and herbal teas. It's suitable for display in living rooms, tea rooms, and milk tea shops. The kettle body is thickened and reinforced, with finely polished edges, making it less prone to chipping during daily handling and cleaning. Its durability far surpasses that of thinner, smaller glass kettles, resulting in less wear and tear with long-term commercial use.
The kettle body is made entirely of thickened high borosilicate glass, a key difference between it and ordinary soda-lime glass kettles. This material has an extremely low coefficient of thermal expansion, capable of withstanding extreme temperature differences from -30°C to 200°C. Pouring boiling water directly into a chilled kettle after refrigeration, or placing it on an electric ceramic stove or open flame for continuous heating, will not cause it to crack. The glass is free of heavy metals such as lead and cadmium, and its chemical properties are stable. Long-term brewing of Pu-erh tea, black tea, and fruit teas will not absorb impurities or alter the original flavor of the beverage. The smooth, dense inner wall makes it difficult for tea and fruit stains to adhere; a simple rinse with water restores its clarity, eliminating the need for frequent detergent cleaning.
High borosilicate glass is highly regarded primarily for its four core characteristics. First, it boasts exceptional heat resistance, capable of withstanding sudden temperature changes of 150°C to over 200°C. Even when directly placed from a frozen environment into a high-temperature oven or poured with boiling water, it is unlikely to shatter. Second, it exhibits excellent chemical stability, demonstrating strong resistance to acids, alkalis, and salts. It will not react with food or release harmful substances, making it an excellent food-grade material. Furthermore, it possesses high light transmittance (typically greater than 90%), resulting in a crystal-clear appearance and superior visual appeal. Finally, its mechanical strength and hardness surpass those of ordinary glass, making it more resistant to impacts in everyday use.
Thanks to its outstanding performance, high borosilicate glass has a wide range of applications. In daily life and household use, it is an ideal material for microwave-safe dishes, heat-resistant teapots, coffee cups, and double-walled glassware, not only being safe and non-toxic but also perfectly preserving the original flavor of beverages. In the medical and scientific research fields, due to its strong corrosion resistance and high-temperature resistance, it is often used to manufacture laboratory glassware such as beakers and test tubes, as well as pharmaceutical packaging such as ampoules. In the industrial and new energy sectors, high borosilicate glass is a key material for solar vacuum collectors, stage lighting reflectors, astronomical telescope reflector components, and the coating of space shuttle insulation tiles.
Overall, high borosilicate glass, with its robust properties such as high temperature resistance, resistance to sudden temperature changes, high chemical stability, and high light transmittance, represents a significant innovation in modern basic materials industry. Whether in modern homes prioritizing health and environmental protection or in the demanding environments of industry and scientific research, high borosilicate glass demonstrates extremely high practical value and broad development prospects.
