Can Stainless Steel Go In the Microwave? (Explained!)

Stainless steel is a type of metal that’s common to our kitchen utensils and even cookware. In fact, most containers we rely on for food storage are made of such. Now, one thing you may wonder about is if it’s safe for reheating, especially in the microwave. So, you may ask:

Can stainless steel go in the microwave? Stainless steel can’t go in the microwave, and you shouldn’t put any stainless steel inside. Metal products like such blocks microwaves and can cause an explosion. Thus, it’s hazardous, so you should avoid it as much as possible.

In general, stainless steel products are widespread, especially in typical households. Thus, you may wonder how any of these metals affect the microwave and their possible effects. 

In this article, we’ll walk you through some of the stainless steel products you’ll likely have at home and their effects if put in a microwave. This way, you can understand the hazard it entails and make sure to avoid such an instance.

Without further ado, let’s get into it! 

Can Stainless Steel Go In the MicrowavePin

Is stainless steel safe to microwave?

Stainless steel is not a safe item to be placed inside a microwave. The reason is that metals like these types of products don’t absorb microwaves. Instead, they bounce it back, causing sparks and even a fire hazard. 

Such an issue is real if stainless steel has complex shapes. For instance, a fork or a couple of stainless steel inside the microwave can cause sparks. 

In short, stainless steel is nothing but a potential danger if placed inside a microwave. Thus, it would help if you avoided such at all costs.

What happens if you put stainless steel in a microwave?

As I mentioned earlier, stainless steel or any metal doesn’t absorb the microwaves used for heating. Instead, they bounce it back and cause sparks, eventually leading to fire hazards.

Thus, if you have any stainless steel containers such as lunch boxes or bowls, you shouldn’t place them in your microwave, especially for reheating purposes. 

With this in mind, you may wonder how to reheat your food if you have a stainless steel lunch box.

How do you heat a stainless steel lunch box?

A stainless steel lunch box is not an exception to the microwave principle. Like other metals, these types of lunch boxes can start a fire through a single spark.

Thus, it would be best to put any stainless steel lunch box inside the microwave for reheating. But, of course, the same thing goes with any stainless steel equipment.

If you want to reheat food inside a stainless steel lunch box, you can do so by taking out the food and reheating it through a microwave-safe container. Or, you can use an oven for such.

Can you microwave stainless steel lunch box?

No, you cannot microwave stainless steel lunch boxes as such a kind of item can causes microwaves to spark and ignite a fire. 

The metals like a stainless steel lunch box do not absorb microwaves. Instead, they bounce it back, causing microwaves to spark and ignite. In worse cases, they may even cause an explosion.

Can stainless steel bowls go in the microwave?

No, stainless steel bowls cannot go in the microwave. Any form of metal like stainless steel bowls is not compatible with microwave heating. 

Instead of absorbing the heat, they will bounce it back, causing fire to spark. Also, the metal will block the microwave, failing to reheat the food inside. In short, you’ll want to transfer your food to a microwave-safe container before reheating.

Can stainless steel mug go in the microwave?

Stainless steel mugs are lightweight and perfect for travel. However, like other stainless steel products, these metal mugs are not safe in the microwave.

Instead of stainless steel mugs, you should use a ceramic mug to reheat your beverage. This way, you won’t damage your microwave and suffer from any unwanted incident.

Can stainless steel cups go in the microwave?

Like mugs, stainless steel cups are lightweight and ideal for on-the-go use. These metal cups, like other stainless steel items, should not be microwaved.

If you are going to reheat your beverage, you should choose a ceramic cup rather than a stainless steel one. This way, you won’t harm your microwave, and you won’t have to deal with any unpleasant incidents.

Can stainless steel thermos go in the microwave?

No, because most thermoses are constructed of stainless steel, you should not microwave them. If you put stainless steel in the microwave, it may cause the microwave to break. Furthermore, both the microwave and the thermos may blow up!

Why can’t you put stainless steel in a microwave?

If you put a stainless steel item in a microwave, it won’t heat the food or drink inside. Instead, it will cause damage to your microwave or even spark some fire which can get dangerous.

The microwaves used for heating are not absorbed by stainless steel or any other metal. Instead, they bounce it back, causing sparks and, eventually, fire hazards.

As a result, if you have any stainless steel containers, such as lunch boxes or bowls, you should avoid using them in the microwave, especially for reheating.

How do you heat food or drink in stainless steel containers?

Instead of using microwaves to reheat food or drink in a stainless steel container, you can do it in an oven. You can even use a toaster if you have one.

Stainless steel can undergo heat for up to 350 degrees Fahrenheit. However, if you put them in a microwave, even low heat can cause them to ignite or explode. If you have a stove, you can reheat your food through it. 

What kind of metal can go in a microwave?

The only possible metal that can go in the microwave is items made of aluminum. However, it’s still not an ideal thing to place in a microwave. 

If you pursue such, make sure you know about your microwave’s capacity and the items you can reheat with it. Also, make sure your foil is smooth, new, and not crumpled in any way. 

Still, if you have any other heating options, it would be best to steer clear from using a microwave if you’re reheating in a metal container.


So, can stainless steel go in the microwave? No, any stainless steel or even metal should not be in a microwave for reheating. Any form of metal like stainless steel doesn’t absorb heat from microwaves. Thus, if you reheat food inside a stainless steel container, the food won’t heat up. Instead, the process would cause sparks inside the microwave that can even explode.

As a general rule of thumb, don’t put anything made of stainless steel or metal inside your microwave. Instead, use microwave-safe containers if you need to reheat your food. 

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Image credits – Canva

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