Can Pyrex go in the Instant Pot? Is Pyrex safe to use when pressure cooking?
CAN YOU USE PYREX IN INSTANT POT?
I’ve been happily using my Pyrex glass bowl in my Instant Pot for Pot-in-Pot cooking for quite some time.
I’ve used it to cook frittatas, french toast casseroles, rice, quinoa and desserts.
Using pyrex for pot-in-pot cooking in my Instant Pot has always been successful and I never once worried about it until…
Recently, a reader asked if Pyrex was safe to use in the Instant Pot since she had heard conflicting information.
I WILL ALWAYS do my best to share the most accurate information and would never encourage doing anything that might cause any harm.
So I decided to do some research of my own to find out exactly what the rules are about using Pyrex glass in the Instant Pot for things like pot-in-pot cooking.
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ok if oven safe
According to Instant Pot, it’s safe to use anything in the Instant Pot that says it’s OVEN SAFE. Ok, phew! I was relieved to know that I was indeed safe using my OVEN SAFE Pyrex dish.
Pyrex says no
I discovered what Pyrex’s statement on using their Pyrex dishes to pressure cook. Pyrex does not recommend pressure cooking with it’s products.
Well rats, that stinks. It wasn’t as safe as I thought if the actual company says it’s a no-no.
Borosilicate vs. Soda-lime
As I dug further into research, I discovered this article that shares the history of the Pyrex glass. The original company started with the brand PYREX (written in all caps). This glass was made out of a formula called Borosilicate, which is known for it’s thermo shock resistance.
That means that the glass is more stable and when exposed to temperature fluctuations. Any dishes that you buy (used off Ebay or thrift stores) with the older PYREX label are made out of Borosilicate formulated glass.
In the 90’s, the company changed to a soda-lime glass formula and also changed their logo from PYREX to pyrex (with all lowercase letters). Soda-lime glass doesn’t fluctuate in expansion and retraction to high/low temperatures. This means that there’s higher risk of shattering due to thermo shock.
Thermo shock occurs when you take a cold/hot item and rapidly change the temperature it’s exposed to. Like placing a hot pan on a cold counter, or pouring water into a hot dish in the oven. You’ll end up shattering the glass.
However, this new soda-lime glass formula is more durable when dropped and doesn’t break as easily. It just has higher risk with extreme temperature changes.
If the glass happens to break while pressure cooking in the Instant Pot, it doesn’t mean that you’re going to blow up your kitchen. It just means that you will have a mess of glass to clean up when you open the lid after pressure cooking. You’ll need to toss the food too.
USE older pyrex
If you can get your hands on some older PYREX (labeled with all caps), you’ll have a better dish for resisting thermo shock. Or buy any imported from France, where they still make PYREX out of borosilicate.
Instant Pot and Pyrex Merge
Have you heard the recent news that Corelle (Cornell Capital investing firm), the parent company of Pyrex, bought the Instant Pot company? Many are hoping that with this merging of companies, new products and accessories will be made that are safe for pressure cooking in the Instant Pot.
Safe to use in INstant pot
If you’re still feeling uneasy about how safe it is to use Pyrex in your Instant Pot, here is a list of other acceptable accessories you can use in your Instant Pot.
- Glass canning jars are designed for pressure canning. Unless you have the Instant Pot Max model, you won’t be using these jars to can in your Instant Pot. Many Instant Pot owners use canning jars to pressure cook successfully. They are glass, so they can break but they are created to withstand the pressure during canning. Check out the amazingly delicious Small Batch Instant Pot Lemon Curd by Julia at Imagelicious for her use of glass for pot-in-pot pressure cooking.
- Ceramic ramekins are used by many, although technically it can still break if there are any cracks/fissures.
- Quick Cooker Ceramic Pot by The Pampered Chef is made specifically for use with pressure cooking! Plus it comes with a silicone lid and a wire cradle to lift it out easily too!
- Silicone is safe to use inside the Instant Pot.
- Stainless steel is always a safe choice. You can find several stainless accessories to use here.
- Non-stick baking pans are also safe for pressure cooking. However, due to risks of chemicals leaching into foods and possibility of the coating flaking off into food, we avoid using these products now.
- Aluminum pans are also popular to use in the pressure cooker. Our family is stepping away from using aluminum products due to research about it’s correlation to Alzheimer’s disease.
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