Whether it is the lid or container, our products are made of high-flow polypropylene which fulfils the safety requirements for microwave usage. This material is able to withstand temperature from -18°C (0.4°F) to 100°C (212°F). Should deep freezing is required, a freezer-proof polypropylene is used to withstand temperature as low as -33°C (-27.4°F). Our resin mixtures are well-formulated to achieve strength, clarity and practicality in our products.
