Are there many hidden dangers in ordinary glass bottles?

The low-priced glass bottles sold in supermarkets and street stalls are mostly ordinary sodium-calcium glass. Some small workshops use recycled raw glass for smelting, and the raw materials are mixed with lead and heavy metal impurities, which is the biggest safety hazard for home use. Weak tolerance to temperature differences is a major drawback of ordinary glass. When the temperature difference exceeds 75℃, there is a risk of cracking. In winter, when cold cups are directly poured with boiling water or refrigerated containers are heated, they are very likely to shatter. Flying glass fragments pose a risk of scratches.

From the perspective of material structure, ordinary glass has more impurities and bubbles inside, a relatively high density, and a heavy feel. If acidic or oily foods are stored for a long time, harmful ions inside the glass will slowly precipitate, and the risk increases especially after repeated high-temperature heating. The upper limit of high-temperature tolerance is only 200℃, making it impossible to enter ovens or steamers, and its application scenarios are limited.

High borosilicate glass is refined and purified at high temperatures, free of harmful heavy metals, and is a food-grade safe material. It can withstand a temperature difference of 150℃, is heat-resistant and wear-resistant, and has a light, thin and sturdy bottle body. It is widely used in tea, storage and pharmaceutical packaging. The cost gap between the two stems from the production process. High borosilicate requires high-temperature melting and high-purity raw materials, which is difficult to process and naturally has a higher price. However, its safety and durability comprehensively outperform those of ordinary glass.

When purchasing for home use, it is recommended to distinguish the usage scenarios: For short-term, room-temperature storage of dry goods, qualified ordinary glass can be selected. For containers that require long-term storage of hot drinks, sauces, or heating and refrigeration, high borosilicate materials are preferred. Do not purchase low-priced bulk glass bottles without a manufacturer or label. Products from regular large factories have a complete quality inspection process, and their materials, thickness, and heat resistance all meet the standards, providing greater security for use.