Not all plastics are microwave safe. Some plastics can release potentially harmful chemicals such as BPA or phthalates when heated. These chemicals can leach into food, especially if the plastic is old, scratched, or specifically labeled as non-microwave safe.

To minimize risks, always check if the plastic container is labeled as microwave safe. Even then, it’s best to avoid using plastic containers for food and beverages in the microwave for extended periods. Opt for glass or ceramic containers, which are safer alternatives when heating food.