Is it safe to microwave Pyrex containers immediately after removing them from the freezer and removing the plastic lid?
I am attempting to bulk prep some frozen convenience food and have determined that a standard Pyrex glass container would be ideal for freezing (non-liquid) meals (think burritos or tacos), but I want to ensure it is safe to induce a huge temperature swing, or if there is a better way to do this.
Best Answer
It not huge, it's just the difference from freezer to room temperature you are worrying about
E.g. -20°C to 20°C, is A 40°C shift. The shift was going to be 20°C to 100+°C anyway. There is no physical reasons why this would be anymore stressful
From room temperature you are raising it 80°C, from frozen you are raising it 120°C. Not a problem in the normal temperature range for glass
The freezing temperature of water (most common item in food) has no relation to the freezing temperature of glass etc
Pyrex and other glasses can be damaged if one part of them is instantly heated or cooled by a 100°C or so
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Quick Answer about "Is it safe to microwave Pyrex containers immediately after removing them from the freezer and removing the plastic lid?"
It will explode into pieces if you directly put cold Pyrex into a high heat microwave after removing it from the fridge or freezer.Can you microwave Pyrex straight from the fridge?
Can Pyrex Go From Fridge To Microwave? Yes, Pyrex can go from fridge to microwave. Glass containers can also go from freezer to microwave too.Can you microwave glass straight from the freezer?
The hot microwave rapidly heats up the cold glass, causing it to vibrate violently and shatter due to thermal stress. Regardless of whether the glassware is made of natural or synthetic glass, you can't microwave it from a cold state.Can you microwave Pyrex plastic lids?
Pyrex\xae glassware plastic lids are BPA free. They are safe for use in the microwave and for food storage.Can Pyrex go from the freezer to the oven?
Pyrex is safe for storage in the freezer, and the Pyrex website states that the glassware can go directly from the freezer and to an oven temperature of around 300 degrees.More answers regarding is it safe to microwave Pyrex containers immediately after removing them from the freezer and removing the plastic lid?
Answer 2
Pyrex used to be made with BoroSilicate glass. Now some Pyrex is made with SodaLime glass, which isn't so tolerant of rapid temperature changes. So you need to follow the instructions for the dishes you have.
If in doubt don't heat Pyrex straight from the freezer. Rather eg transfer contents to another such dish already at room temperature for heating (if you can't wait for it to defrost naturally). http://www.consumerreports.org/cro/magazine-archive/2011/january/home-garden/glass-cookware/glass-cookware/index.htm
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