Can Glass go in the Freezer? Detailed Guide!

Storing foods and drinks inside the freezer is never easy if you have a small compact freezer. It made you come to a point where you seek a better way to freeze your goods. It is safe to say that you can freeze glass and containers made of glass.


But because glass is a breakable entity, there are a few things that you need to consider before placing food inside the glass or putting the glass inside the freezer.

This article will explain freezing methods to help you better understand whether you should keep glass inside a freezer. 

Can Glass go in the Freezer?

Yes, glass can go in the freezer. And to do so, you must consider thermal shock. Heating the glass quicker or cooling it faster can be a problem for glass. Let the glass container rest at room temperature before placing it inside the freezer. The below points will further describe the problems while freezing glasses. 

  • Thermal Shock 

Among all other problems when dealing with glasses, thermal shock is one of the critical problems to consider since it can shatter the glass. Thermal shock is a sudden change in temperature that can mess with the molecular integrity of the glass and result in a shattered or cracked glass.

Since high-temperature changes cause thermal shock, your best possible solution is to change the temperature until it slowly comes to room temperature. When freezing glass, the same is applied; do not just put a warm glass inside the freezer.

Leave the glass outside till the temperature is at room temperature before putting it in the freezer. Remember to check the glass when you Freeze it to see any cracks on the body. You must do the same when you are about to remove the content inside of the glass. 

  • The Right Type of Glass

When freezing, it is essential to know the type of glasses. All glasses are not shatterproof and might not handle such low temperatures. A glass can bear high temperatures, such as inside a microwave oven.

Still, there remains the possibility of a thermal shock in low temperatures. Below are some glass containers and how they behave in freezing temperatures. 

  • Mason Jar

Mason jars are safe compared to regular jars, but you need to be aware to take some precautions. Something that does change is thermal shock.

A Mason jar doesn’t save you from thermal shock. Whenever freezing liquid expands, make sure to leave some space in the mason jar. Leaving about one or two inches of space should be fine.

Also, do remember that the longer you freeze glass containers, the greater the chances of freeze burning form. If you are not concerned about freezer burn, a mason jar could be the best glass for you. 

  • Drinking Glass

Drinking glasses cannot be used for freezing since they have the most thermal shock chance. But they can be great for leftover drinks. Since they are not built for freezing, they cannot be frozen for a longer period.

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How Can You Tell if the Glass is Freezer Safe?

The best way to know if the glass is freezer-safe is by looking for a symbol at the bottom of the glassware. You will find some symbols at the bottom of the glass. A symbol like snowflakes can indicate that the glass can is freezer safe. 

Even if you cannot find any symbol at the bottom of your glass containers, you can still freeze them. Below are three tips to help you freeze glass containers. 

Tip 1: Slowly cool down 

Since glass is not thermal shock resistant, it is important to make sure you can save your glass containers from any unwanted shocks. All you have to do is let your glass containers cool down before placing them in the freezer and after removing them from the freezer. Let the glass container rest until it reaches room temperature. 

Tip 2: Use simple containers

Glass containers that have shapes and edges can create stress points. It is better to use containers without edges to remove that unwanted stress. 

Tip 3: Leaving spaces

It is important to keep in mind that when glass containers bump, they can break. So best to leave some space between glass containers as the clinking of containers can make them break apart. 

Can You Put Pyrex Glass in the Freezer?

Pyrex glass and containers have to be the best way to store food in your freezer. Pyrex glasses are super durable, similar to mason jars. But that doesn’t protect the glass from a thermal shock.

Unlike a mason jar, pyrex containers have rubber lids that provide additional liquid space that you can leave empty. Since pyrex containers have rubber lids, it will help keep them separate from other containers inside the freezer, thus saving them from cracks. 

Can you put the glass in the freezer overnight?

You can put a glass inside the freezer overnight, but it depends on the type of glass you will keep inside the freezer. You can put regular glass and drinking glass inside a freezer for a short period or overnight. Putting them on for a longer time might result in cracks.

For mason jars and pyrex glass, it isn’t easy. You can put them inside your freezer for a long time, and they will still be fine. You might as well keep in mind that every glass that you place inside your freezer will go through thermal shock. 

Can you put a drinking glass in the freezer?

Yes, you can put a drinking glass inside the freezer for only a short time. Compared to other glasses that might stand out in low temperatures, drinking glasses are the least resistant to low temperatures.

You can place it in the freezer for a short time only to get it cold and remove it after a while. But leaving it for a long time or even overnight might result in a broken or cracked glass. 


Glasses are essential even though they are breakable. These are must-haves inside every house and are often served with food in front of guests. They look good when you hold them or drink from them.

But it is hard to freeze them with some advice and protection. You can freeze some glass containers, but that is not highly recommended. A household freezer is often packed with plastic containers and plastic bags containing raw food or fish, and placing a glass container might break. So be aware that broken glass could be the outcome when you freeze a glass container.