Is Gladware Microwave-Safe
What to know

Is Gladware Microwave-Safe or Not?

Is Gladware or Glad-type containers safe for use with the microwave or not? Keep on reading to find out the truth about them! They’re famous for glassware, plasticware, and lunchboxes.

Certain plastic and glassware lunchboxes and containers for portable eats can be safely microwaved without them resulting in thermal shock, meltdowns, or damage from excessive heat produced by microwave radiation’s interaction with their material.

Are Glad’s Gladware-brand dinnerware, ovenware meal containers, and the like safe to microwave or do they leach off BPA and other plasticizers unto your food? What about their glassware?

Is Gladware Microwave-Safe or Not?

Can GladWare or Gladware by Glad be microwaved? According to the makers of Gladware, yes you can. They recommend lifting the container lid first to prevent pressure from building inside the otherwise airtight container that could result in a food explosion afterwards.

The lifted lid also allows the Gladware lunchboxes and food containers to vent off the resulting steam, since the microwave radiation basically interacts with water molecules in order to raise the temperatures of the food and boil them from the inside.

However, not everyone agrees that Gladware is absolutely microwave-safe or even dishwasher-safe. Many people argue against microwaving anything made of plastic

Is Gladware Microwave-Safe
Is Gladware Microwave-Safe?

Do Most People Agree That Gladware is Microwave-Safe?

Some believe that microwaving plastic should never be done and your food containers should be limited to ceramic or chinaware and glass. Even the most BPA-free and FDA-approved of plastics still leach off a minute amount of BPA and other plasticizers to your food.

Plastic has a lower heat tolerance compared to ceramic or glass dishes. Therefore, the materials might partially melt and leach off harmful chemicals all over the food they’re supposed to contain when microwaved.

However, as far as the Food and Drug Administration is concerned, any plastic, ceramic, or glass container with the microwave-safe label is considered microwave-safe, which includes Gladware.

How About Glad’s Glassware and Ovenware?

For the most part, even without the microwave-safe label (but it’s better if you get it) anything made of ceramic or glass is considered microwave-safe. An oven-safe ovenware container used for baking lasagna and the like typically can handle the peak temperatures possible with the microwave.

This is the reason why the health-conscious use opal ware, glassware, or ceramics instead of plastic containers from Rubbermaid, Tupperware, Ziploc, and Glad to heat up, cook, or otherwise prepare their food because those items are assuredly 100% BPA-free.

The Exceptions to the Rule

There are exceptions to the rule that glassware is microwaveable. If the glass is too thin—like in the case of wine glasses—it’s not microwaveable. If the glass has a warning against microwaved, it’s not microwaveable. The glassware of Glad are thick enough to take the heat though.

The thinner the glass the likelier it is to suffer from thermal shock or cracking under pressure from sudden temperature changes (a hot plate placed on a sink full of cold water, for example).

Should You or Shouldn’t You Microwave Plastic Gladware?

According to many authorities and experts, the overall safety of plastic containers remains in contentious debate. However, Tupperware, Ziploc, Rubbermaid, and Glad have gotten FDA approval for the micorwaveability of their products.

They also use marketing campaigns to sell the safety of their product, claiming them to be 100% BPA-free when no plastic is that and the FDA only approved of their microwave use because their BPA leaching reach safe levels of minuteness.

The Great Debate on Plastic Microwaveability

Plastics have limits when it comes to microwave ability that ceramic or glass don’t have. This is why if your Tupperware or Gladware have cracks or damage you’re recommended against microwaving food on them because they’ve been compromised and they could emit more BPA in their damaged state.

The microwave heat could also worsen the holes, cracks, and brittleness of such products. The resilience of plastic when facing any heating elements, from microwaves to ovens, has always been in question.

See more: Can You Microwave Plastic?

Go with the Recommended Instructions for Use

If you insist on not erring on the side of caution by using GladWare then you can ensure your safety by going for Glad’s recommended instructions for use. The info provided on how to microwave with the container should be followed to the letter, such as lifting the lid to prevent pressure explosions.

Read the Gladware FAQ (Frequently Asked Questions) online in order to find out the best way to microwave such containers with you and your family’s safety in mind.

Erring on the Side the Microwave-Safe Symbol

The microwave-safe symbol to look for in Gladware is the one with the five squiggly lines on top of one another. These wavy lines compose of the symbol assuring you that the FDA has approved the container for microwave use.

Such a symbol shows FDA approval assuring you that the product’s BPA leaching is in safe levels or minute levels that won’t impact you in the least. The symbol might also accompany the image of a microwave oven or a dish set below the waves.

Are Glad Heatables Microwave-Safe?

According to Glad, Glad Heatables live up to their name and can be safely microwaved as well. Yes, they have aluminum foil within them and most microwave users are warned against microwaving metal.

On one hand, there are exceptions to this rule or else you wouldn’t be able to microwave hot pockets. The foil on the containers can be used on toasters, ovens, and microwaves safely. The item is reusable and disposable at the same time. They also minimize spills by being leak-resistant.

On the other hand, if you start seeing the warning signs of microwaving metal such as sparks flying or electrical arcing, shut off your microwave immediately and don’t microwave the Glad Heatables.

To Sum It Up

Gladware is microwave-safe according to the FDA. It doesn’t mean it’s completely free of plasticizers when microwaved. It’s just that the plastic Gladware uses for food containers leach off the least amount of BPA and other chemicals in such minute levels your food remains safe for consumption.

As for Gladware glassware or ovenware they’re also mostly microwave-safe and dishwasher-safe but they should mostly be used for ovens rather than microwaves. As a rule of thumb if it can take the heat from the oven then it could take the heat of the microwave with certain exceptions.


  1. Can You Microwave GladWare?“,, Retrieved January 23, 2022

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