Can You Put Boiling Water in Pyrex?

Pyrex glass is a special kind of glass resistant to heat, electricity, and chemicals. The majority of cookware manufacturers use pyrex glass for making their glassware these days. However, many of you must be wondering, can you put boiling water in pyrex?

You can put boiling water in pyrex glass since it is heat-resistant to a temperature higher than boiled water and can withstand the thermal shock of boiling water. You can easily pour the water of such a temperature into pyrex glasses without any breakage or shattering. 

But you need to be extremely careful and not shock the pot since sudden temperature changes may cause the glass to break and fissure.

Can You Put Boiling Water in Pyrex

In addition, do not put the pyrex glass from the refrigerator directly on the heat since the sudden temperature change would shatter the glass. You can use the material not only for boiling water but also for a variety of thermal activities. There are a few essential things that you should know about Pyrex glass before you use it in the kitchen.

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Is It Safe to Put Boiling Water in the Pyrex Glass?

In a pyrex glass, boiling water is completely safe since the glass has a high resistance to expansion on heat and does not shatter on heat, but you must be extremely careful. You should be cautious of thermal changes since only immediate thermal shocks can crack or break the glass. 

To prevent sudden thermal shocks, you should gradually add boiling water to the bowl of pyrex glass. This pyrex will allow the material to slowly adapt to the temperature and reduce the risk of shattering.  

Why Does Pyrex Glass Not Crack When We Put Hot Water on It?

Pyrex glass does not crack on heat or when filled with boiling water because it has a low thermal expansion coefficient, making it resistant to sudden thermal shocks. 

It is made to withstand heat and high temperatures, so unlike other glasses, it does not expand much on heat, preventing it from breaking. That’s why it is not affected by immediate thermal shocks and can be used with boiling water. 

Learn more! For more details about glass bakeware, check out our article Are Glass Bowls Oven Safe?

Can You Boil Water in a Pyrex in the Microwave?

The pyrex glass manufacturers claim that pyrex is safe for microwave use, so you can use it to boil water in the microwave. Pyrex is preferable for microwave use as it is heat resistant and allows safe heating and reheating of food in the microwave. 

But do not put the pyrex glass from the refrigerator to the microwave for boiling cause sudden thermal change would surely shatter or crack the glass and might cause other hazards.

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Does Pyrex Work on the Stove for Boiling Water?

You can use pyrex cookware made to be on the stovetop to boil water without shattering. Pyrex can be used on the stovetop or not, depending on the dish you are using.

It can indeed withstand high temperatures, but different types of pyrex glasses have other properties and use, so it has to be used accordingly, or else you would break the glass. So read the guideline carefully that comes with the pyrex dish to see if you can use it on the stovetop or not, and if you do not have such guidelines, then avoid using it on the stovetop cause it could be dangerous.

When pyrex is heated unevenly, it expands and contracts from different sides, shattering glass. If you use pyrex glass on the stovetop, which is not meant to be on, it could cause a haphazard situation and break the glass on the stovetop. 

What Is the Maximum Temperature Pyrex Can Withstand?

The temperature limit for pyrex glass varies from -192℃ to +500℃, making it a versatile choice for glassware and cookware for direct heat use. It is preferably used at 425℉ to 450℉ temperature with preheated oven for oven use. 

But it is always advisable to use pyrex at a lower temperature for safe and convenient cooking. Pyrex glass is made from silica and boric acid, making it highly heat resistant. Pyrex can withstand massive thermal changes, but sudden and immediate changes can cause glass shattering. 

Learn more! Check out our article on Can You Bake Brownies in a Pyrex Dish?

Can You Use a Pyrex Bowl for a Double Boiler?

Pyrex bowls are a preferable choice for double boilers compared to regular bowls because they are more heat resistant, safe, and convenient for a double boiler. As the pyrex glass is heated indirectly in a double boiler, it would be much safer.

But be careful with the bowl to be in direct contact with the boiling water, which could result in the shattering and irregular expansion and contraction of the glass.

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Best Ways to Add Boiling Water in the Pyrex Glass

  • Heat the pyrex bowl a bit before adding the boiling water so that the glass will not undergo sudden thermal changes. The glass at room temperature or a bit heated is suitable for adding boiling water, and only a cold bowl is prohibited.
  • Put a metal spoon in the bowl before adding boiling water to the glass, then add the water to the scoop. Metal is a great conductor of heat, and when you pour water on the spoon, it absorbs heat and reduces the water temperature. Thus, it would be much safer than adding boiling water directly.
  • Another way to add boiling water to the glass is to add it gradually so that the pyrex would adapt to the temperature, and this way, you can prevent sudden thermal shocks.


Pyrex glass is the most versatile material for glassware and cookware. Unlike other materials, it has a unique property of heat resistance which allows it to withstand high temperatures and thermal changes. When used with boiling water, it must be handled with great care and safety as an irregular thermal change could shatter or break the glass. 

You can boil water in the pyrex glass in the microwave and use it to heat or reheat food. Different pyrex glasses have other properties, so they are used accordingly. The pyrex, which is not made for the stovetop, shall not be used on the stovetop.

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