The main characteristics of glass jars include high transparency, high temperature resistance, easy cleaning, good chemical stability and high air tightness. Glass jars have high transparency, and the state of the items in the jar can be intuitively seen, which is suitable for observation and display. It has good high temperature resistance, can withstand large temperature changes, and is not easy to burst. The surface of the glass jar is smooth, it is not easy to adhere to dirt, and it is very convenient to clean. In addition, the chemical stability of glass jars is good, and it will not react with most chemicals, ensuring the purity of the contents. High air tightness can effectively prevent gas exchange and keep the contents fresh.