Laboratory containers include containers for observing experimental processes (e.g., beakers, flasks and test tubes) and containers for storing and transporting experimental results, chemicals needed for experiments and so on. Materials used are roughly divided into resin, glass and metals. When conducting experiments by mixing chemicals, glass containers are suitable due to their superior stability since it is unknown what kind of properties the resulting material will have. Resin containers are also made of stable materials and are more affordable than other products. Resin containers are light and available in a wide variety, especially large containers with a capacity of 20 L. Metal containers are mainly made of stainless steel. In addition to lidded containers, trays for placing laboratory equipment on are also made of metals. Stainless steel is odor-proof and easy to clean.