How can glass jars remain stable and avoid cracking during refrigeration or microwave heating?

During the refrigeration or microwave heating process, the stability of the glass jar is closely related to its material, design, usage and other factors. To ensure that glass jars do not break under these extreme conditions, the following areas require special attention:

Different types of glass have different temperature resistance properties. Glass jars usually used for food storage or heating should choose materials with strong heat resistance, such as borosilicate glass. High borosilicate glass has high heat resistance and temperature change resistance, and can usually withstand extreme temperature changes without cracking. This glass can withstand high temperatures and rapid temperature changes, making it safer to microwave or refrigerate.
One of the main reasons why glass jars break is excessive temperature difference (thermal expansion and contraction). Therefore, sudden temperature changes need to be avoided when using glass jars. For example:
Do not place the glass jar in hot water or heat it in the microwave immediately after taking it out of the refrigerator. The glass jar should be allowed to warm up naturally and gradually adapt to the ambient temperature. Be especially careful when taking it out of the freezer, as low temperatures have a more significant impact on the glass.
When heating in the microwave, do not put the refrigerated glass jar directly into the microwave for heating. Let the jars sit at room temperature for a few minutes to make sure they are no longer too cold.
When using a microwave, avoid overheating liquids or food in glass jars. Excessively high temperatures may cause the glass in the jar to heat unevenly, causing it to break. To prevent this, it is recommended to:
When heating the microwave oven, you can choose a lower power, heat it in multiple times, and check the temperature of the food or liquid each time.
If the lid of a glass jar is too tight to allow steam to escape during microwave heating, the internal pressure may cause the glass to break. You can choose to loosen the lid or use a microwave-safe lid (one with holes) that allows steam to escape.
If a glass jar has cracks or minor damage, especially during refrigeration or heating, these cracks can cause structural instability in the glass, increasing the risk of breakage. Therefore, check the integrity of glass jars regularly and replace them with new ones immediately if cracks or damage are found.
Some glass jars on the market are designed for microwave use or refrigeration, and are usually labeled with labels such as "heat-resistant" or "microwave-friendly". The design of such glass jars can better adapt to temperature changes. When purchasing, choose a glass jar with these labels to ensure it is specifically designed to withstand the temperature fluctuations of microwaving and refrigeration.

The shape and design of the glass jar also affects its stability under changes in temperature. For example, rounded and uniform designs can withstand external pressure and temperature changes better than jars with sharp corners or irregular shapes. In addition, thicker glass can withstand extreme temperature changes better than thin glass, so when purchasing, you can choose a thick glass jar to enhance its ability to withstand heat and cold.
For most glass jars, placing it directly on a fire source (such as an open flame, hot plate, etc.) may cause the glass to break. Glass jars should avoid direct contact with open flames to avoid excessive temperature and rupture due to local heating too fast. If you need to heat the liquid, it is recommended to use a microwave or hot water instead of heating the glass jar directly.
When cleaning glass jars, avoid using extremely hot or cold water. Water that is too hot will cause the glass jar to be affected by severe temperature differences in a short period of time, causing it to break. Use warm water and an appropriate detergent when cleaning, and avoid using cold water to immediately rinse glass jars that have just been removed from the microwave or refrigerator.
When storing, avoid stacking or over-squeezing glass jars, which may affect the jar's structural integrity and lead to breakage.
When refrigeration, the sealing of glass jars is very important. A well-sealed glass jar can effectively maintain the freshness of food, but a tight seal may cause the food or liquid inside to expand, increasing the risk of rupture. To avoid this, you can choose to use a lid that doesn't seal completely, or loosen the lid before heating.

Whether the glass jar can remain stable and avoid breakage during refrigeration or microwave heating depends on the material, design, usage method, etc. Selecting high temperature resistant borosilicate glass, avoiding drastic temperature changes, reasonably controlling the heating time, paying attention to sealing and regularly checking the integrity of the tank are all effective measures to ensure the stability of the glass tank. Correct use and maintenance methods can extend the service life of glass jars and ensure that they can maintain good performance in various environments.