Things You Should Never Put in a Microwave

Sunday, March 16, 2025  Read time1 min

Microwaves are one of humanity’s greatest inventions for making life easier and enjoying a variety of foods quickly. However, due to their unique heating mechanism, some foods and items should never be placed inside. In this article from Saeed News, we have compiled a list of things you should never put in a microwave.

Things You Should Never Put in a Microwave

What Should Not Be Put in a Microwave?

Be careful—putting the wrong items in a microwave can cause serious problems. Below is a list of things that are strictly forbidden inside a microwave.

1. Takeout Boxes

Many people make this mistake and only realize it when it's too late. Never put paper takeout boxes in the microwave.

In addition to paper, keep metal away from the microwave, as it can cause a fire.

Avoid putting plastic, paper, or metal bags and boxes inside the microwave.

Newspapers should also not be microwaved, as they catch fire easily.

Plastic bags may release toxic gases when heated.

Takeout boxes

2. Eggs

Don’t believe the myths! If you try to cook an egg in the microwave, you will regret it.

The high heat causes the egg to explode, leaving you with a mess to clean up.

Eggs

3. Fruits

Most fruits cannot withstand microwave heat and tend to burst.

Grapes explode, while raisins will start to smoke.

As a general rule, avoid microwaving any kind of fruit.

Fruits

4. Disposable Containers

Styrofoam (foam-based) containers should never go in the microwave.

Styrofoam is a type of plastic that contains harmful chemicals that can be released into your food when heated.

Disposable containers

5. Frozen Meat

Microwaving frozen meat to thaw it is a bad idea.

The high heat causes bacteria to grow rapidly, reducing the quality and safety of the meat.

Frozen Meat

It’s better to thaw meat naturally in the fridge or using cold water.

6. Aluminum Foil

One of the most dangerous things you can put in a microwave is aluminum foil.

Why?

Aluminum reflects microwave energy instead of absorbing it.

This can cause sparks, damage your microwave, or even start a fire.

7. Other Items You Should Never Microwave

Here are other dangerous materials that should never go inside a microwave:

Containers with metal handles

Plastic grocery bags

Yogurt cups and other soft plastic containers

Plates with gold or metallic decorations

Plastic food storage containers that are not microwave-safe

Thermos flasks, travel mugs, and insulated cups

Expensive ceramic dishes

Clothes and fabric items

Dry sponges

Polyester materials

Open containers

Final Warning

Even if you put nothing in the microwave and turn it on, you will still damage it.

Why? The microwave needs something inside to absorb the heat.

If it’s empty, the microwave absorbs its own energy, which can cause internal damage or even break the device.