The principle of thermal insulation of double-layer glass cups is similar to that of hot water bottles, that is, hollow: the inner glass of double-layer glass carries water, and the air or vacuum below is separated from the outside. The innermost glass can block the consumption of heat, and ultimately, it achieves better thermal insulation effect than ordinary glass. However, it only has better thermal insulation effect than ordinary glass and cannot achieve long-term thermal insulation.
The raw material of double-layer glass cups is high borosilicate glass, food grade catering glass, which is fired at a high temperature of 600 degrees Celsius. It is usually made of high borosilicate glass tubes, upper and lower tubes of different sizes, and baked by technicians in a sealing machine. It is a new type of environmentally friendly tea cup and is increasingly favored by people. As a double-layer glass cup, it has become the best tea set for drinking water and brewing tea, especially for brewing various famous teas. The tea set is crystal clear, Not only is it suitable for viewing, but the effect is also very good. At the same time, the glass is of excellent quality and affordable, which is deeply welcomed by consumers.