Glass jugs are a popular choice for kitchenware due to their transparency, durability, and aesthetic appeal. However, a common concern is whether these jugs are heat-resistant and safe for handling hot liquids.

The heat resistance of a glass jug largely depends on the type of glass used in its manufacturing. The most common types of glass are Borosilicate glass, Soda-Lime Glass, Tempered glass. Below are the characteristics of these glasses

Borosilicate Glass

Borosilicate glass is renowned for its excellent thermal resistance. It contains silica and boron trioxide, which make it resistant to thermal shock. This type of glass can withstand sudden temperature changes and is commonly used in laboratory equipment and kitchenware like measuring jugs and teapots. And the temperature range is typically safe up to 400°C (752°F)

Soda-Lime Glass

Soda-lime glass is the most widely used glass for everyday products. While durable, it is less resistant to thermal shock compared to borosilicate glass. It can crack or shatter if exposed to sudden temperature changes.And the temperature range is typically safe up to 100-150°C (212-302°F), but care must be taken to avoid rapid cooling or heating.

Tempered Glass
Tempered glass is treated to enhance its strength and thermal resistance. It’s commonly used for oven-safe cookware and some glass jugs. If it breaks, it shatters into small, less dangerous pieces. The temperature Range can handle temperatures up to 200-250°C (392-482°F).

There are also some factors affect whether a glass jug can handle high temperatures.

Firstly the glass thickness, thicker glass is generally more resistant to cracking under heat but may take longer to adjust to temperature changes.
Secondly the Quality and Manufacturing Process, High-quality glass made with precision processes is less likely to develop flaws that can lead to cracking.
Thirdly the intended Use, the glass Jugs designed for brewing tea or storing hot liquids are typically made with heat-resistant materials.

So not all glass jugs are heat-resistant, but those made of borosilicate or tempered glass are suitable for handling hot liquids. Understanding the type of glass and following safe usage practices can help prevent accidents and extend the life of your glassware. Always consult the product label or manufacturer for specific care instructions to ensure safe and optimal use.

JY FlameGlass factory always offer heat resistant glass jugs, glass teapots and glass cups, these are borosilicate, it is safe and high quality.