Is Tupperware Microwave Safe?

By: Olivia Taylor

Tupperware Meal Prep
Photo By: Ella Olsson at Pexels

Tupperware containers are convenient for storing leftovers and meal prepping. But how do you know if your Tupperware can be microwaved? Is Tupperware Microwave Safe? If you’re unsure, you basically have two ways to know:

  1. The container has the microwave symbol stamped on the bottom with a series of wavy lines
  2. The bottom of the container is stamped with a #5 stamped on it.

Let’s walk through each of these identifiers so you can learn, in more detail, how to get the most of out of your Tupperware.

Is it safe to reheat food in Tupperware?

Microwave Symbol: If your Tupperware is microwave safe, it will have a symbol on the bottom that indicates it is microwavable. There are a few variations of this symbol. For example, it can have just squiggly lines, it can have squiggly lines inside a box shaped like a microwave or it can have squiggly lines with a box under it.

Squiggly lines is the universal symbol to indicate that your container is microwave safe.

Symbol Number Five: Number 5 stamped on the bottom of a plastic container means it is dishwasher safe and microwaveable. These plastic containers are very sturdy and are heat resistant.

Keep in mind that sometimes your container may not have a symbol on it. It may have the actual words “microwave safe” on the bottom.

If your Tupperware is not microwaveable, it will have a rectangle symbol with squiggly lines and a diagonal bar going across it. It looks similar to the “do not” symbol used for no smoking.

Can Tupperware be microwaved?

Storage containers are meant to save time and add convenience to our lives. Yes, Tupperware can be used in the microwave. Tupperware has been designing microwave safe containers since the 1980’s when the microwave become very popular. However, you should always check your container to make sure it is microwave safe.

How do you clean dirty Tupperware?

Cleaning your Tupperware properly is the key to making it last for many years. You should always consult the manufacturers instructions before your first use. If you don’t follow the manufacturers instructions, you may void the limited lifetime warranty you might have.

To clean Tupperware using this method will take overnight soaking. Here are the steps to clean your storage containers properly to help make it last for many years.

Step 1

The first step is to rinse out the containers and remove any food.

Step 2

The second step is to coat the container with baking soda. Just sprinkle some on to to cover the surface.

Step 3

The third step is to scrub the container with a coarse sponge. Make sure you scrub the entire surface.

Step 4

The fourth step is pretty cool. Add a little bit of vinegar to the container. The result will be a fizzling reaction.

Step 5

Gently scrub the container with the same coarse sponge to make the entire container is covered in the mixture.

Step 6

Fill the Tupperware container with extremely hot water. Add the lid over the container to make the heat last longer and let it sit overnight.

Step 7

When you wake up the following morning, simply empty the container and add a little more hot water along with some dish soap. Scrub a little, rinse, and towel dry. Your container should look like new.

What is Tupperware?

Tupperware is a brand of plastic containers that are used for storing food. It was invented in the late 1940’s by Earl Tupper who worked as a chemist. He was inspired and modeled Tupperware after the design of a paint can and lit.

What really set Tupperware apart was the way it was sold. Originally, it was sold in stores. However, people didn’t know how to use it. As a result, the Tupperware party was invented. To this day, Tupperware is still sold through parties and their representatives websites.

While the line of products offered today is much larger, they are still designed with one goal in mind. To make our lives easier and more enjoyable. In the meantime, they are also helping reduce the impact on the environment by making reusable products.

Microwave Tupperware with Lid On

Microwave containers are designed to make your life easier, save time, and help the environment. Tupperware microwave containers are no different. Tupperware microwave containers are made to heated & reheated safely. While using Tupperware containers you will maintain the taste and quality of your leftover foods.

Tupperware microwave containers come with limited lifetime warranty. As with most manufacturer warranties, you must use the containers the way they are meant to be used. Otherwise, you void the guarantee or warranty.

Tupperware microwave containers come with a vent on the lid. It is very important that you do not reheat food with the lid off or uncovered because direct exposure of micro-waves can toughen food making it chewy and dry. The special vent lid is perfect for reheating food. It allows the steam to vent while still covering food. If your food storage container does not have a vent, lifting the edges will do the same thing.

Microwave ovens can create hot spots and cool spots in the food. It is important to check the food, stir, and reheat if necessary.

Not all Tupperware containers are microwave safe. If you have vintage Tupperware you will need to check the bottom of the container for the microwave symbol. You should only use Tupperware microwave safe containers in the microwave.


Tupperware has been a staple in the American kitchen for nearly seventy years. While the line of products offered today is much larger and more diverse, they are still designed with one goal in mind. To make our lives convenient, easier and more enjoyable.

In addition, they are also helping reduce the impact on the environment by making reusable products. What’s your favorite piece of Tupperware? Comment below and let us know.