Plastic beakers have a high-temperature resistance of approximately 100°C. I. High-Temperature Resistance and Reasons for Plastic Beakers Plastic beakers are typically made of materials such as polypropylene (PP) or polystyrene (PS) and exhibit a certain degree of heat resistance at specific temperatures. Generally, the high-temperature resistance of plastic beakers is around 100°C. This is because the melting points of polypropylene and polystyrene are approximately 165°C and 240°C, respectively. Beyond these temperatures, the plastic starts to melt, losing its structure and properties. II. Guidelines for Use

1. Avoid exposing plastic beakers to high-temperature environments to prevent melting or deformation.
2. Prevent contact with organic solvents, strong acids, strong bases, and other substances that may cause chemical reactions and damage the structure and properties of the plastic beaker.
3. Choose a suitable alcohol lamp or electric hot plate for heating, and control the heating time and temperature to avoid exceeding the high-temperature resistance.
4. Clean the plastic beaker promptly after use and store it in a cool, dry place, avoiding direct sunlight, high temperatures, and humidity. III. Conclusion Plastic beakers find wide application in laboratories, but their high-temperature resistance is relatively low. Proper usage and storage can extend their lifespan, enabling the safe and efficient completion of experimental tasks.