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Can Pyrex Go in the Oven? (Safety Guide)

If you’re shopping for new kitchen items or already own Pyrex glassware and are planning for a new recipe, you might be wondering:

Can Pyrex go in the oven? Is it safe?

When using any kind of kitchenware, safety is paramount. But this is especially true of glassware like Pyrex, which can shatter if not used properly.

In this quick guide, you’ll learn:

  • Which Pyrex products are oven-safe
  • How to safely use Pyrex products in the oven
  • The maximum oven-safe temperature
  • Dangers to avoid
  • Whether or not Pyrex lids can be used in the oven
  • And more

So, if you’re hesitant to use your Pyrex in the oven and want to know the safety facts, keep reading.


Use the links below to navigate this guide:


Can Pyrex Glassware Go in the Oven? The Short Answer

The short answer is yes; Pyrex glassware is completely safe to put in a preheated oven. But, Pyrex plasticware, including the plastic lids that come with the glassware, are not oven-safe. The plastic lids are designed for storage only and will melt if you put them in the oven.

It’s important to note that Pyrex glassware is preheated oven-safe, which means it’s oven-safe, but only if the oven is preheated before inserting the glassware. I explain why this is so important in the next section.

The chart below outlines which Pyrex products are oven-safe and which are not.

ProductOven-Safe?View Details
Pyrex Glass BakewareYesPyrexware.com
Pyrex Glass Pie PlatesYesPyrexware.com
Pyrex Glass Mixing BowlsYesPyrexware.com
Pyrex Glass Measuring CupsYesPyrexware.com
Pyrex Glass Custard CupsYesPyrexware.com
Pyrex Glass Food Storage ContainersYesPyrexware.com
Pyrex Glass LidsYesPyrexware.com
Pyrex Plastic LidsNoPyrexware.com

If you have any doubts, Pyrex provides plenty of information on its Use and Care page confirming that its glassware lines are safe. 

If you’re ever unsure about a particular product, go to the product page on Pyrexware.com and click the “Care and Use” tab.

The packaging also specifies whether a Pyrex product is oven-safe and includes information about how to properly care for the item before, during, and after using it in the oven.

Additionally, oven-safe Pyrex glassware has the words “PREHEATED OVEN ONLY” etched into the bottom.

Pyrex preheated oven-safe label etched into the glass

Still, it’s important to note that there is a proper way to use Pyrex cookware in the oven, which I cover in the next section.

How to Use Pyrex in the Oven Safely

When using Pyrex glassware, the key is to avoid thermal shock.

Thermal shock occurs when a breakable material, like glass, is exposed to a drastic temperature change—the sudden shift from hot to cold or vice versa results in competing pressures across the surface area.

When Pyrex glassware is exposed to radiant heat, like that of a heating oven, the side of the glassware closest to the heat source grows hot while the inside and other parts further away from the heat source remain cool.

Pressure begins to build as the differing temperatures exert stress on the material, which can lead to the glass shattering into pieces.

Exploding glassware incidents are not only dangerous but extremely messy and hard to clean up. To avoid such a disaster, preheat the oven before you put your Pyrex glassware inside. A preheated oven has a uniform temperature; therefore, radiant heat won’t stress one side of the glassware.

Additionally, make sure your glassware has reached room temperature before heating it. You should never place glassware directly from a refrigerator to an oven.

Another situation that could cause thermal shock is when cold juices drip out of the food onto the hot glass. To avoid this, pour a small amount of liquid in the bottom of your Pyrex glassware before putting it in the oven. The liquid will act as a buffer and lessen the likelihood of shattering or cracking.

For safety, always use both hands when removing Pyrex glassware from the oven. And, of course, always use potholders.

When you remove Pyrex from the oven, place it on a padded surface such as a dry, folded dish towel or potholder and let it cool.

Never place hot glassware directly onto a countertop, stove, sink, or damp towel (the quick temperature change could result in thermal shock).

If the glassware does break, take care to let it cool before cleaning it up. Keep in mind that shattered glass creates many small particles and pieces that may be difficult to find. A handheld vacuum cleaner can help make sure you don’t accidentally miss any shards.

Never try to reuse broken Pyrex glassware, even if the majority of the dish is intact.

Pyrex Maximum Oven-Safe Temperature

There’s a lot of information on Pyrex’s website confirming that its glassware is oven-safe, but there’s no mention of the maximum oven-safe temperature. 

To find out, I contacted Pyrex directly and asked:

Is Pyrex Glassware safe to use in the oven? If so, what is the maximum oven-safe temperature?

The response from the Pyrex customer service representative was:

Pyrex glass bakeware is designed for use in a preheated conventional or convection oven at any temperature that is called for in a baking recipe, so long as you follow the Pyrex Safety and Usage Instructions.  Remember that Pyrex glass bakeware is NOT to be used on the stovetop or under the broiler. 

Response from Pyrex Customer Service
Response from Pyrex Customer Service

Although the Pyrex rep claimed the glass bakeware is oven-safe at any temperature, do not exceed 425°F. Extremely high temperatures can result in thermal shock (and the glass breaking). 

Dangers to Avoid When Cooking With Pyrex

There are several situations you should avoid when using Pyrex.

Do not use Pyrex glassware:

  • On a stovetop
  • Under a broiler
  • On a grill
  • To cook food in a microwave (reheating previously cooked food is fine)
  • In the microwave when empty or almost empty
  • To heat butter or oil

All of these mistakes could result in broken glass and a big mess. Take heed and avoid these situations when using your Pyrex products.

Are Pyrex Lids Oven-Safe?

Pyrex plastic lids are not oven-safe. If you put them in the oven, they will melt.

Can Pyrex Plastic Lids Go in the OvenCan Pyrex Plastic Lids Go in the Oven

They’re only meant for food storage, such as keeping leftovers in the fridge.

Pyrex plastic lids can be used in the microwave for reheating purposes, but always double-check the product label and Pyrex website for information if you have any doubts.

If you need to cover Pyrex glassware while putting it in the oven, you can use aluminum foil to create a makeshift lid. A baking sheet will also work fine for this purpose.

Pyrex glass lids that come with the casserole dishes are preheated oven-safe.

Warranty Coverage

Pyrex offers a two-year warranty on glassware products, specifically to address damage due to thermal shock and shattering. This warranty is only for glass products, however.

Accessories such as lids or plastic storage containers are covered by a different warranty and only offer protection against manufacturing defects discovered upon purchase.

Each product line has unique specs and protections, but all Pyrex bakeware includes a two-year warranty. If you need to check the details of a product, you can find it listed on the Pyrex website and read the relevant section.

Bottom Line: Pyrex Is Safe in a Preheated Oven

Pyrex cookware is durable, attractive, and comes in a wide variety of shapes and sizes, so it’s no surprise that so many home cooks purchase it for their homes and kitchens.

But there are understandable concerns about using Pyrex in the oven, especially with so much chatter online about the possibility of it shattering.

As with any cookware, it’s important to know how to use Pyrex products safely and properly.

The most important thing to remember about Pyrex cookware is that while the glassware is oven-safe, the plastic lids are not.

Additionally, be cautious to avoid thermal shock. Keep these tips in mind:

  • Always preheat your oven before inserting Pyrex glassware.
  • Never exceed 425°F.
  • Make sure the glassware is at room temperature before exposing it to heat.
  • Add a small amount of water to the bottom of the glassware before placing it in the oven.
  • When removing Pyrex bakeware from the oven, pay attention to where you place it. Use both hands to move it, and make sure to set the cookware on a dry cloth surface such as a folded towel or potholder.
  • Never expose hot glassware to cool water or a cold surface, and don’t take it straight from the fridge to the oven.

If you have more questions, call the Pyrex customer service department at 1-800-999-3436. You can also go to the consumer services section of the website for help.

You’re now better informed and well-prepared to make the most of your Pyrex cookware. It’s time to start cooking!

Andrew Palermo Founder of Prudent Reviews

Andrew Palermo - About the Author

Andrew is the Founder and Editor-in-Chief of Prudent Reviews. He’s been studying consumer buying behavior for over a decade and has managed marketing campaigns for over a dozen Fortune 500 brands. When he’s not testing the latest home products, he’s spending time with his family, cooking, and doing house projects. Connect with Andrew on LinkedIn or via email.

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