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BPA Free Clear Borosilicate Glass Water Bottle supplier tells you: high borosilicate glass has a high coefficient of expansion. Generally speaking, if you take the cup out of the refrigerator and immediately put it into the hot water that has just been opened, the cup will not break at a temperature of minus 20 degrees to above 130 degrees. There is no problem with single-layer glass products, and it is no problem to put them directly into the microwave oven, or to dry them on an open flame for 20 minutes. High borosilicate is mainly used in glass products, microwave ovens, solar tubes, chemical reactors, chemical reaction vessels, etc. It is currently the safest drinking water product in the world.

The water resistance and acid resistance of high boron heat-resistant glass are grade one, alkali resistance is grade A, and the harmful components of glass are less than 0.1%. Instead, other glass is used instead to reduce costs.
High borosilicate heat-resistant glass is a kind of "cooked glass", which is quite expensive and fully meets the international environmental protection testing standards. Due to its own performance requirements of heat resistance and resistance to instantaneous temperature difference, high borosilicate materials are used to replace a large number of harmful heavy metal ions such as lead and zinc in "raw glass", so its brittleness and weight are far smaller than ordinary "glasses" that are common in life. "raw glass", and it ensures that there will be no bursting phenomenon in the case of sudden temperature changes. It is much lighter in weight than "raw glass" containing a large amount of heavy metal ions. BPA Free Clear Borosilicate Glass Water Bottle supplier I think it looks different from ordinary glass in appearance, and it is visually separated from the hard and brittle feeling of "raw glass".