What Do the Symbols on Your Plastic Food Containers Mean?

Not all plastic containers are microwave safe.

Photography: Shutterstock (main)

Few people ask themselves, "Is this plastic container safe to use in the microwave?"

That's because many of us grew up thinking that plastic (any plastic) is safe to use in the microwave. You probably have many stored in your cabinets since packing away food to store is one of those mundane tasks that everyone does. Whether it's take-out and delivery containers or using your own stash of reusable plastic containers, these food storage containers are indispensable in a healthy home.

Plastic is the most common material for these containers. It's the "safe" material versus aluminum that causes sparks and glass that may shatter when blasted with the radiation in the microwave. There are other materials used in storing food but are these really safe for food?

Take a look at your containers and check what symbols are on them. Do you know what they mean?

These symbols are great for telling you what you can do with your food storage containers beyond storing your food. Not all plastic containers are microwave safe and you can tell by checking if it has the symbol that it is. Here are the most common symbols on your food containers, so you can learn what they mean:

Recommended Videos

1. Food Safe Symbol

The most common symbol consisting of a wine glass and a fork is one you should see on all food containers you have. Basically, this is the international symbol for food-safe materials. It can also be known as the food grade or food safety symbol. This can be found on plastic, ceramic, glass, metal, and other materials made to be in contact with food. This is especially important for plastic containers since some plastics are not used for food.


2. Freezer Safe Symbol

When you see this symbol of a snowflake, you know that the food container you have is safe to use in the freezer.

3. Microwave Safe Symbol


An icon of a microwave oven is a good indication that the material is safe for use in the microwave. You may find these on many plastic and glass containers as well as ceramic and stone dinnerware. However, you won't find this on melamine dinnerware and should not be used in the microwave.

Other microwave-safe symbols may be just wavy lines that symbolize the radiation. While you can easily check to see if your container is microwave safe, it's still best to follow the manufacturer's advice. 

4. Oven Safe Symbol


Obviously, plastic containers won't have this symbol but your glass and ceramic containers might. It's always good to check for this oven-safe symbol on your dinnerware and cookware so you know that you can heat the food safely in the oven. This can very well apply to the air fryer which you might have instead of a conventional oven. 

5. Dishwasher Safe Symbol


If you happen to have a dishwasher, this is the symbol you want to watch out for in your dinnerware and cookware. This is a rather generic symbol since some symbols are of dishes under a rain of water or the food safe symbol of wine glass and fork in water. These utensils are best placed on the top rack of your dishwasher for best results.

* * *

This story originally appeared on

* Minor edits have been made by the editors.

More on

Real Living is now on Quento! Enjoy more of our stories by clicking here to download the app.


Read more stories about

Latest Stories

Where to Stay in the Metro: 10 Airbnbs Under P2,500 For Your Next Staycation

These cozy accommodations offer a dose of design inspiration, too!

6 Ideas to Design a House with a Rooftop

If you're planning on redesigning your rooftop space, or just about to design a house that has one, here are some ways you can maximize your space

Interior Designers Unmask Trendsetting Furniture at MasKAREde Ball

The event also highlighted KARE's eclectic mix of furniture, lighting, accessories, and gifting pieces

7 Design Ideas for a Two-Storey House

Need some fresh ideas as you design your house? These space-saving plans will help you get the most out of your two-storey build

Bungalow House Design Tips and Tricks to Maximize Space

Make the most out of your bungalow's space by applying these small-home ideas

Modern House Design Ideas for a Sleek New Home

Planning to go modern for your new home? Here are 5 modern home styles to jumpstart your ideas.

You Can Book This Mediterranean-Inspired Villa in Bulacan For Your Next Getaway

Get a couple of design ideas during your stay, too!

This Idyllic Bahay Kubo in Silang, Cavite Promotes Sustainability

The Understory offers an intimate farm-to-table dining experience

A Modern Rustic Retirement Home in San Juan

Space Project Interior Design Services used Venetian plaster and wooden touches to create a haven that's sleek yet inviting

A Scandi-Inspired Condo Home for an OFW Nurse

Two units were combined to create a 45sqm space which interior designer Audrey Letada spruced up into a simple yet welcoming dwelling

A Contemporary Makeover for an Outdated Condo Unit in Ortigas

Inspired by chiaroscuro, a treatment focusing on the contrast of light and shade, Space Project Interior Design Services turned the old condo unit into a modern haven

Gold Porcelain Tiles and a Pocket Garden Complete This Loft-Type Penthouse

Using high-end finishes and furniture, design consultant Euzon John Catayong was able to transform the 155sqm space into a picturesque home
Load More Stories