Metal containers, foil, and utensils should never be placed in the microwave. Metal can cause sparks and lead to a fire.
Some plastics can release harmful chemicals when heated. Only use containers labeled as microwave-safe, and avoid using plastic containers that are scratched or damaged.
Styrofoam containers may release harmful chemicals when exposed to high temperatures. Transfer food to a microwave-safe dish before reheating.
Brown paper bags can catch fire in the microwave due to the intense heat. Use microwave-safe containers or dishes instead.
While aluminum foil is a common kitchen item, it should not be used in the microwave. The metal can cause a fire and damage the microwave.
Some disposable containers have metal trim, which can cause sparks and flames in the microwave.
Microwaving eggs in their shells can cause them to explode. If you want to cook eggs in the microwave, it's best to remove the shells or use a specialized microwave egg cooker.
Microwaving hot peppers can release capsaicin into the air, which may irritate your eyes and throat. It's safer to cook hot peppers using other methods.
Travel mugs with metal components, such as metal handles or linings, should not be microwaved. Use microwave-safe containers for heating liquids.
Items like takeout containers or yogurt cups not labeled as microwave-safe may release harmful chemicals when heated. Transfer food to a microwave-safe dish before reheating.