Top 6 Kinds of Cups That Are Microwave Safe

Microwaving Cups

You can find microwaves in every house, workplace, hospital, school, and cafeteria. The business of making them has been gaining a lot of popularity because many foods require this equipment to prepare.

Despite their emerging popularity, many people are not sure what can and cannot go into these cooking hazards.

What kind of cups can you microwave? Most cups made of plastic, glass, and ceramic are microwave-safe, as they don’t contain water. This means that the electrons are not free to move around. But, be careful, as some plastic containers are too thin, and they can melt easily.

This article will reveal more about microwaves and what kinds of cups can be used to avoid kitchen hazards.

What Are Microwaves?

Microwaves involve electromagnetic radiation—think of sunlight, radio waves, and some x-rays.

When you place any kind of food in a microwave oven, the microwaves will make the water molecules in the food jiggle or vibrate.

This is how your food heats up. There are plenty of kitchen hazards that you should avoid when using your microwave.

For instance, putting metal in a microwave is generally a bad idea. In metals, the electrons are tiny, negatively charged parts of the atoms and are free to move around.

As a result, metal can conduct electricity and can carry it from one point to another.

Electrons can build up in metallic objects with sharp tips, like aluminum foil. As a result, you can expect some sparks, which will cause fire hazards.

What Materials Are Microwave-Safe?

If you are looking for microwave-safe materials, consider plastic, glass, or any kind of ceramic.

This is because they do not contain water, and the electrons are not free to move around. But still, you need to look out for plastic containers.

This is because if they are too thin, they can melt or release plastic into your food.


When it comes to plastic cups, almost all are safe in the microwave, but if the item is marked as not microwave-safe, do not use it.

As a rule of thumb, always check the labels and warnings found in the packaging or at the bottom of any plastic cups.

Be mindful that you should not heat dry foods in plastic because the plastic can easily melt, especially if it is too thin.

Also, do not use single-use containers like those containing yogurt, cottage cheese, and margarine.

Do not use pitted or warped/melted plastic containers, as they present hazards.


Believe it or not, Styrofoam is known to be safe, but you must be careful, as there will always be exceptions.

Styrofoam can be safely used in your microwave oven when you are heating pure liquids like coffee or water for some tea.

Just make sure to stop heating once it boils. Also, do not heat items that contain fats or solids, like soups or ramen noodles.


Paper is considered to be okay as long as it is the right kind. Think of paper towels, wax paper, parchment paper, and paper plates, bowls, and cups. These are fine in the microwave.

You should not use newspaper as it is not sanitary, and it can leach ink into whatever you are trying to cook.

You should not use materials made of brown paper bags, as they are never safe in the microwave.

This is because they cannot withstand a lot of heat and can easily catch fire.

Aside from that, paper bags are known to emit toxic fumes containing germs that can be passed onto your drink or food.

Glazed Ceramics

Glazed ceramics are known to be safe and can be used in the microwave as long as they have properly formulated glazes.

This includes stoneware, Corning Ware, and glass cookware. However, beware of some glazed ceramics that are not regulated, as some manufacturers use glaze only to contain high amounts of lead and arsenic.

These are dangerous elements in your body and can leach into foods when microwaved.

Another thing about glazed ceramics is that there is a concern about how much the cup can retain.

You can test it out by putting a half cup of water in your bowl or cup and microwaving it for 30 seconds.

If the cup is hotter than the water it contains, do not microwave it, as this is a good test for many glazed ceramics out there. 

Handmade Ceramics

There is a debate as to whether handmade ceramics can be used in your microwave.

According to experts, handmade ceramic dishes and cups are okay for use in the microwave as long as the glaze is not cracked.

To make sure that the cup won’t overheat, you can try the testing as above to see if the cup can pass as a microwavable kind.

Metallic Cups

Metals, as mentioned above, are a nay. If there is a metallic trim on an item, you should get rid of it before you use your microwave.

Not only that, metal can lead to overheating, as well as arc, and damage the oven or your cup.

If you microwave any food or drink using metal, not only is it unsafe, but it is also inefficient.

This is because microwaves cannot penetrate metals. They can reach only the top of the food, which is one reason why you can’t reheat coffee in a stainless steel go-cup.

Best Microwave-Safe Cups

Now that you know what type of cup is safe for your microwave, it is time to figure out which brand you should be looking for.

These products won’t damage your beverage and, at the same time, won’t contaminate your body.

Here are some of the top products available online that have been tried and tested in terms of safety:

Panda Cup Eco-Friendly Reusable Coffee Cup

This cup is perfect on the go if you are looking for a reusable cup, as it is eco-friendly and you won’t have to waste another single-use paper cup.

It has a stick stopper that can help prevent spills, and it can catch drips as well.

It is very easy to maintain, as it can be cleaned in a dishwasher and is perfect if you plan to reheat your coffee in the microwave.

Reusable Coffee Cup with Leak-Proof Lid by Farship Lifestyle

This environmentally friendly cup is a lifetime reusable cup designed with a seal ring and silicone lid to prevent spilling.

It is a food-grade certified material and BPA-free, and the thick and durable borosilicate glass meets all ISO standards.

With the attached silicone in the cup sleeve, it can resist any temperature from -4°F to 248°F (-20°C to 120°C).

It is also microwave-safe and dishwasher-safe, so you can enjoy reusing and reheating all your favorite beverages.

Mora Ceramics Tea Cup

Mora ceramics are considered to be more than just regular teacups or mugs. They are lead-free and made from the all-natural glaze.

Lead is dangerous for the human body, and while some ceramics contain lead, Mora Ceramics do not.

They are FDA-approved, and the ceramics part of the cup is microwave-safe and dishwasher-safe. Plus, the design is simple.

It is a multi-functioning ceramic cup that is perfect for someone who likes to have hot beverages on the go without worrying about contamination.

Finding the Right Cups to Use in Your Microwave

Some cups are considered microwave-safe. If you are using the wrong cup, you can ruin both the dinnerware and your food.

Microwaving non-microwave-safe cups can break, melt, or scald you, and it can also damage your microwave.

So, make sure to use microwave-safe cups for cooking and storing your liquids or food.

Microwaves are convenient appliances, but there are many precautions you should take when using this type of appliance.


There are plenty of microwave-safe cups that you can choose from. Simply select the one that works best for you.

Some cups that don’t have a “microwave-safe” label might be untested, so follow the steps mentioned earlier to determine whether a cup is safe to use in a microwave.

Also, note that there are some exceptions when trying to reheat your favorite beverages.

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