When you put plastic containers and bowls in the microwave, the outcome depends on the type of plastic they are made of and whether they are labeled as microwave-safe or not.
Microwave-safe plastic containers are specifically designed to withstand the heat generated in the microwave and do not release harmful chemicals when exposed to high temperatures. These containers generally have a microwave-safe symbol (a stylized microwave oven) on the bottom or are labeled as "microwave-safe." When using microwave-safe plastic, the container will generally heat up along with the food but should not deform or release harmful substances into the food.
However, it is essential to note that not all plastics are microwave-safe. Non-microwave-safe plastics can melt, warp, or release toxic chemicals into the food when exposed to high temperatures in the microwave. Using non-microwave-safe plastics can be dangerous to your health and can also damage the microwave.
Regarding metal containers or bowls, you should NEVER put metal objects in the microwave. Metal reflects microwaves, and when microwaves encounter metal, they can create electrical currents, leading to sparks and potential fire hazards. Putting metal containers in the microwave can cause the microwave to malfunction or catch fire, posing a severe risk to your safety.
Always use microwave-safe containers, dishes, and cookware when using the microwave. If you are unsure about a specific item's microwave safety, it is better to use alternative microwave-safe materials, such as glass or ceramic, to avoid any potential hazards. When in doubt, check the packaging or consult the manufacturer's guidelines for microwave use.