What type of container is an appropriate choice for storing liquids or gases in a laboratory?

When it comes to storing liquids or gases in a laboratory setting, a bottle is the most suitable container among the options provided. Bottles are specifically designed with a sealed cap or lid that allows for safe containment and reduced exposure to air, which is essential for preventing contamination or evaporation of the substance inside. They come in various sizes suitable for different volumes and are often made from materials that are resistant to the chemicals they store.

Test tubes and beakers, while useful for holding liquids during experiments, are typically not sealed and therefore not ideal for long-term storage. Test tubes are mainly used for holding small volumes of liquid temporarily or for carrying out reactions, while beakers are designed for mixing or heating substances rather than securely storing them. A Petri dish is primarily used for culturing microorganisms and is also not suitable for storing liquids or gases as it is open and lacks a means of sealing. Hence, a bottle stands out as the best option for securely containing liquids or gases in a laboratory environment.