Can You Put Glass In The Oven? 4 Oven-safe Materials You Must Know

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Many people love to store their leftover in a glass container, refrigerate it, and use the oven to reheat the food the next day. However, some doubt the safety of this method, wondering whether glass shatters or breaks in the oven or not. With this in mind, we’ve come up with a detailed post on “Can you put glass in the oven?” Keep reading for the answer.  

Can You Put Glass In The Oven?

Absolutely, we can use glassware inside the oven.

In fact, you can place whatever you like in the oven as long as you don’t turn it on. Unfortunately, shortly after you power on the oven, the heat begins to climb, limiting what you can use. 

So the actual concern here is whether it is OK to place glass in a heating oven or whether it would fracture and break as the heat for baking rises from room temperature to 450°F.

If you’re not sure, it’s better not to place your glass in the oven until you’ve double-checked the specifics.

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What Happens If We Put Glass In The Oven? 

Let’s have a peek at what occurs when we put glassware in an oven, given that the oven is pre-set to 425°F.

When you place any glassware (empty only) in the oven, it only heats up and perhaps a bit more malleable (only at more than 900°F). That’s what happens most of the time.

Why Does Glass Crack And Break In The Oven? 

Glass, in general, combines the qualities of both a solid and a liquid.

This places glasses in a rather special class of objects and the items we utilize as actual solids in our everyday lives. The glass can shatter under specific situations. These situations are:

Extreme Temperature Fluctuations

Heat fluctuation is among the most prevalent causes of glass shattering inside the oven.

Note that the problem here is not the temperature itself. Take this as an example.

Extreme temperature changes can make glass shatter. – 

What happens if you take a glass structured like a flask, load it with liquid, place a secure lid on it, and place it in the freezer? The glass will shatter not as a result of the heat but due to the material (liquid) enlarging, shattering the glass.

In this scenario, the enlarging water particles imposed tremendous pressure on the glass particles. Up to a point, the pressure becomes higher than what the glass could endure naturally. As a result, it breaks. 

Thus, the temperature isn’t the main reason glass breaks in the oven. Instead, there is a different cause for it to fracture. Excessive heat fluctuations, such as rapid and inconsistent heat variations, induce the material to shatter.

The Wrong Type of Glass

Although you may safely use tempered glassware in the oven, it is not the case for non-tempered glassware. Avoid putting drinking glasses inside your oven, and everything that isn’t officially classified as oven-safe should also be on the oven’s NO list.

Borosilicate glassware is designed mainly for use in ovens. People call it Pyrex or even-tempered glasses, given that it is a brand name.

Borosilicate’s reduced expanding rate creates this kind of material, making it more durable than ordinary glass. This material is additionally tempered so that if it does fracture, it will break into tiny fragments rather than massive bits.

Extreme Temperatures 

Most folks are unaware of the downsides of cooking with glassware using the oven: it has a temperature restriction. The production procedure determines this thermal restriction; therefore, it is always lower than the product’s standard, which is frequently stated on the glassware itself.

How To Prevent Glass Cracks And Breaks In The Oven

It’s not impossible to prevent your glass container from shattering in the oven. However, given the reasons above, you only need to walk a few steps to reheat your glass food container in the oven properly.

Don’t Make Sudden Heat Changes

Glass kitchenware does not react well to thermal fluctuations. When heating glassware in the oven, it’s best to start with room temperature and work your way up to a pre-heated setting.

Don’t make sudden temperature changes to prevent breaks and shatters. – Seriereview.  

Moreover, never put anything directly out of the refrigerator or freezer into the oven. While many do this, you still face the possibility of glass shattering.

A similar rule applies when removing a glass plate from the oven. Again, you should not place it in a cold area. Instead, put it in a warmer place on hot cushions.

Avoid Extreme Heat

When utilizing oven-safe glassware, remember to stick to the product’s suggested upper-temperature restriction. This thermal restriction might be anything between 350 and 500°F but aim to keep things far under it to always remain in the safe zone.

Search For Structural Defects

Whenever using glass kitchenware, examine the glassware to ensure there are no existing cracks or dents. Holes or fractures on the glassware suggest vulnerable spots that might shatter when exposed to temperature swings.

Pour Some Water Into The Container’s Bottom When Reheating Dry Foods

When dry heating items inside a glass container, you should pour some water into the container. The explanation for this is that while the dry food heats, it will most likely leak a few moisture contents, eventually making its way to the glass’s edge.

Because this moisture may still be cold, you wouldn’t want it to come into touch with the heated side of the glassware. By introducing a tiny bit of water to the bottom of the glassware, you enable the moisture to heat up while the glass heats up.

Does Hot Glass Look The Same As Cold Glass?

Yes, up to an extent. 

Indeed, glass does not lose its usual appearance under roughly 1200°F. This is enough heat to scorch you, hence explaining why “cold glass appears just the same as hot glass” is a thing to remember in the laboratory or kitchen. 

Don’t believe us? Take a pyrex baking tray out from the oven and see for yourself! It’s between 300 and 500°F, and you won’t notice any change.

Curious what happens if the temperature reaches 1200°F? Something unbelievable begins to occur. 

Heading to 1200°F, the glass starts to melt, then fluoresce with its radiance. The glass will change from dim red to orange, yellow, and eventually white as the temperature rises.  

And at that precise 1200°F, the glass glides as sweet honey. It will stream like water at higher temperatures.

Can You Put a Glass Cover in the Oven?

It depends. 

You can use heat-resistant glassware in the oven without risk. If you have a few glass covers in your home cupboard, it’s time to see if they’re oven-safe. Corning China glass covers, for instance, can tolerate extreme temperatures; however, don’t forget to warm your oven beforehand.

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Are Bowls Oven-Safe? 

It depends on the material of your bowls. If they’re from oven-safe materials, then yes. And if not, then no.

4 Safe Materials To Use In The Oven 


Stoneware is non-reactive to high heat, which means it will not break or leak toxins into your meals. Thus, it’s a wonderful option to put into your oven. However, despite its pros, stoneware may have the following drawbacks:

  • You can’t clean stoneware with soap. 
  • Their price is pretty high. Cheaper options are available, yet you get what you pay for. Thin stones can shatter in no time.

Ceramic or enameled cast iron 

Standard cast iron is a popular choice for the oven. It seeps iron into your meals; however, this only benefits most people’s iron amounts.

Enameled cast iron allows you to exploit the excellent conductivity of cast iron while still using detergent (but infrequently) and to avoid the concern of acidic foodstuffs interacting with the cast iron.

Enameled cast iron is a great option. – Pinkoi 

Ceramic kitchenware offers a comparable covering to enameled cast iron, and all should be lead-free. 

Also, only use new enameled ones instead of old enameled oven pans. This is because old ones might carry cadmium or lead, which could also leach into your meals. Before purchasing a new product, verify with the maker to confirm that the components are lead-free.

Stainless Steel

There have been some concerns about stainless steel potentially leaking nickel, although it is usually considered non-reactive, notably if the acidic foodstuff is not stored in it. Most eco-friendly establishments offer stainless steel baking trays, pizza trays, and bread trays to the “safe materials” section.

Specialized Glass 

Besides the above materials, you could also use specialized glass in ovens. Below are some of the most notable options and their characteristics.

Chemically Tempered Glass: 

  • It is capable of withstanding temperatures of up to 450°F.
  • Such glassware is available in thicknesses ranging from.020 to 18 inches, meaning you can get super durable products. 

Pyrex Glass:

  • It can handle temperatures varying from 450 to 914°F.
  • This glassware is available in various thicknesses ranging from 0.20 to 21/4 inches, meaning you can get super durable products.
  • Such products have polished appearances and come in red, blue, and amber shades.
  • You can utilize such glassware in the oven, at the campfire, or in higher temperature settings.
  • You can also temper this glassware for better heat tolerance.

Pyroceram Glass is another excellent material. – Ubuy 

Pyroceram Glass:

  • It can tolerate temperatures varying between 1300 and 1427°F.
  • Its thickness is around 0.20 inches, which is quite durable to use.
  • This glassware is available in transparent and white.
  • This glassware may be used in the oven, as stovetops, and around open fires.

Quartz Glass:

  • It can withstand temperatures varying from 1700 to 2200°F.
  • This glassware is accessible in clear and polished finishes.
  • This material is typically utilized in scorching settings.

Robax Glass:

  • It can tolerate temperatures ranging from -400 to 1400°F.
  • The material has various thickness options, from 0.118 inches to 0.197 inches.
  • This glassware comes in various shades, namely carbon black, brocade, lava black, amber gold, satin silver, anthracite, copper, and polar white.
  • They come in a variety of patterns.
  • You may use such glassware in the oven, campfire, and wood-burning burner windows.

Tempered glass is also a nice choice. – Wide Open Eats

Tempered Glass:

  • It can withstand 450°F. 
  • Its thickness varies from ⅛ inches to 1 inch.
  • The products are available in multiple shades: cobalt blue, low iron, blue, acid-etches, green, bronze, and grey. 

Vycor Glass:

  • It can tolerate temperatures ranging from 1700 to 2200°F.
  • Its thickness varies from ⅛ inches to ¾ inches.
  • The material is only available in clear color featuring a sleek appearance.

Wrapping Up

There you have the answer to “Can you put glass in the oven?” Most of the time, glassware won’t face any impacts from the ovens (given that there aren’t sudden temperature changes or extreme temperatures above 900°F). However, it’s best to utilize specialized glass or other oven-safe materials to prevent any risk from occuring. 

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