✔ The volumetric flask is made of polypropylene, which does not break like glass and can be reused for a long time, with excellent chemical resistance and durability. 

✔ The bottle mouth has a plastic stopper to reduce evaporation and prevent liquid leakage; The long neck shape is convenient for holding and shaking to mix liquid. 

✔ When pouring liquid, please use a glass rod to drain it slowly to prevent the liquid from leaking. When mixing liquids, please plug the bottle cap tightly before shaking to prevent the liquid from splashing. 

✔ Suitable for various occasions, the flask is suitable for a variety of occasions, such as laboratories, chemical rooms and so on. 

✔ Note: When storing liquids, make sure the cap is tightly closed. When you finish using the volumetric flask, please remember to clean it and ensure it is dry after cleaning.