can glass tupperware go in the oven

Can Glass Tupperware Go in The Oven? [Shocking Result]

Tupperware glass containers are fairly popular among people these days. They are 100% lead and BPA-free, making them ideal cooking ware.

But, can glass Tupperware go in the oven?

Tupperware glass containers are oven-safe if it’s made of tempered or borosilicate glass. Ordinary Tupperware glass shouldn’t go into the oven. Tempered Tupperware glass containers can withstand temperatures from -20C to 300C. When placing it in the oven, make sure to remove the lid from it.

That’s not enough information to figure out which Tupperware containers are heat-resistant. Read our next sections to get a clear idea of it!

Is Glass Tupperware Oven Safe?

Can glass Tupperware go in the oven? The answer to this is, Yes. Tempered Tupperware Glass is oven safe under certain conditions, not ordinary ones. 

The glass container they produce is of two types, ordinary glass, and tempered glass. Their differences are similar to toughened and tempered glassware

Ordinary glass Tupperware is usually not advisable to use in the oven. Because they can’t withstand the heat and pressure in the oven. 

The normal glasses and drinking mugs from Tupperware are usually made of ordinary glasses. Whereas heating containers from Tupperware are usually made from tempered glasses. Such as Pyrex and Ikea glass containers. 

Tempered glass can withstand from up to 300 degrees to minus 20 degrees Celsius. However, there are a few conditions you must be aware of. Let’s talk about them.

01. Check Heat-Resistant Label

Always check for the heat-resistant label on your Tupperware glass containers. Usually, the label is found curved at the bottom of the container’s body. 

If you don’t see the label then check the manufacturer’s guide provided with the boxing. They’ll contain detailed information on whether it’s heat-resistant and how to use it in the oven.

02. Remove The Lid

Tupperglass containers come with plastic or silicon-made lids. If not removed they’ll melt and shatter inside the oven. And you wouldn’t wanna clean the sticky Tupperware along with melted plastic or broken glasses.

So, make sure you’re taking the lid off before placing them in the oven.

03. Avoid Sudden Temperature Change

Although Tupperware claims its glass container can be used right out of the freezer to oven, we suggest otherwise. Doing so can cause a crack in the glass even if it’s highly heat resistant.

Because the sudden change in the temperature sends the material to thermal shock. As glasses are unable to expand fast unlike metal, they may form cracks. 

What Causes Glass to Break in The Oven?

The main reason why glasswares break in the oven is due to direct heat and thermal shock. Most glasses can not bear direct heat. Some glass containers can be used for cooking on gas or halogen stove. But they are specifically built for it.

glasswares break in the oven
Source: The Pan Handler

It can’t expand or contract as fast as metal does. When a glass container directly goes from the freezer to the oven or vice-versa it goes into thermal shock. That causes the glass to form cracks and later shatter.

So, be careful when you’re using glassware instead of a cornbread pan to bake brownies or other stuff. It’s recommended to cool the glass container at room temperature before putting it in the freezer or oven.

How Can You Tell If Glass Is Oven Safe?

Glasswares that are oven safe come with an oven-safe symbol on them. The logo is usually embedded in the bottom of the glassware. Always flip the glassware to see the logo while buying oven-safe glassware.

Glasswares that are oven safe
Source: Kitchen Seer

The label resembles the shape of waves or a micro oven. In case, you don’t see any label on it, check the packaging of the glassware. The packaging or the manufacturer’s book should contain information about its heat resistance.

Furthermore, it also contains general instructions regarding using it. 

Using Glass Tupperware in The Oven: Simple Tricks

Even if the glass Tupperware is oven-safe you must follow some guidelines if you want it to last long. These are some simple tricks that’ll keep your Tupperglassware trouble safe.

  • Before you put your Tupperglass container in the oven check for any visible damage on it. If there’s any scratch on it, inspect it carefully to ensure it hasn’t formed into a crack yet. If there’s any crack in it, don’t put it in the oven. Because it might shatter.
  • Try to keep the temperature within 300 degrees Celsius if possible. Use metal containers for recipes that require higher temperatures.
  • Don’t place the glass Tupperware from the freezer directly in the oven. Let it defrost at room temperature and then place it in the oven.

Similarly, don’t put the hot glassware in the freezer or cold water/surface instantly after removing it from oven. Doing so causes thermal shock in the glass and the container might shatter for it. Always bring it to room temperature before placing it in the oven or freezer.

  • Recipes like pork loin or roast chicken don’t require all the space in the dish. So, the temperature distribution in the glassware surface may vary.
Glass Tupperware in The Oven
Source: The Pan Handler

To avoid this, use a little amount of liquid ingredients while placing them in the oven. It’ll keep the temperature even on the glassware surface. However, don’t use too much water and create issues like excessive butter on a cheesecake crust.

  • Some glassware is advisable to be used in preheated ovens. Check whether your Tupperglassware needs to be preheated before putting it into the oven. You can check if it requires preheating or not from the manufacturer’s booklet. 
  • Avoid using your glass Tupperware under direct heat. Never use it on a broiler or a stove.
  • When you take out the glass container, place it on any wooden or silicon potholder. You can use a dry cloth as well.

Frequently Asked Questions (FAQs):

Can ziploc glass containers go in the oven?

Just like Tupperware, Ziplock has oven-safe glass containers. But their heat-resistance level isn’t as high as Tupperware. It can be exposed up to a maximum of 400F or 204C temperature. The lids are made of plastic or silicon. So, they must be removed before placing the container in the oven. 

Can Ello glass containers go in the oven?

Ello glass containers are oven and microwave-safe. They are made from borosilicate glass which is heat resistant and can withstand temperature fluctuation. However, you must remove the lid before putting them in the oven. Ello glass containers can withstand 450F of heat at maximum.

Can Woolworths glass containers go in the oven?

Like other kitchenware brands, Woolworth makes oven-safe glass containers. Their oven-safe glass containers are made from tampered borosilicate glass, which is durable in heat resistance. It can withstand thermal shock up to 150C and can withstand 250C at max in the oven.

What to do if glass breaks in the oven?

If a glass breaks inside the oven, first turn off the oven and let it cool down. Once the temperature goes down, remove bigger pieces of glass carefully. For removing the smaller pieces, you can use the vacuum cleaner hose. Another option is to use a sponge or thick towel to remove them.

Final Thoughts

That’s all from us about “can glass Tupperware go in the oven”. You know the answer! Hopefully, you can use your Tupperware glass containers in the oven with ease now. 

Don’t avoid reading the manufacturer’s book though. After all, glassware can be different from brand to brand and series. A variety of materials are used to produce them.

So, their tolerance level is also different. Good luck!

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