Any idea if this is borosilicate or soda lime glass?
1950133
There is no indication on the bottom of the glass other than they are made in France. Sorry not to be more helpful.
1535412
To the best of my knowledge, these are not borosilicate glass. They are tempered glass, highly durable. I've used these Duralex bowls (and glass tumblers) for 30 years without a single break or chip.
482411
I believe its glass pieces. It looks nice but the lights are above the crystals so you don't get the simmering effect I'd hoped...
1243690
I believe the base is plastic. Its hard to tell its difference from glass. I am pleased with quality this shaker and bought it becuase of the spout, which is a handy feature.
1211911
The body is glass. I was very pleased when I got mine, it was just the sort of "soda shop" straw holder I was looking for.
354678
it's definitely not glass . probably a good high impact plastic.. it is also leak proof on it's side. i really like them and have 3.
1596523
I have only had occasion to use these particular pieces in the microwave, however I have some older pyrex I've used in the over for many years. Thar being said, I researched this online and came up with this unconfirmed info: "Pyrex in US used to be made of borosilicate glass, now the Pyrex bakeware you see are made with soda lime glass. The Pyrex lab glassware are still made with borosilicate glass. In short borosilicate glass has a very low thermal expansion coefficient which is why scientists have little problem using these borosilicate lab glassware for chemical reactions. Not to say they will never break, but they are resistant to thermal shock. Soda lime glass is not. Therefore you hear all these US Pyrex bakeware breaking."
2071864
I cannot remember but I feel I must done this research before I purchased it as I know about it. I will research it again and I will let you know. It Other than that I am very satisfied with it. It ssys it is glass so I believe it should be OK.
551856
I do believe its glass. Its truly a wonderful set and especially for its low price. I promise you wont be upset with this purchase as i am very happy with it.
2207911
They are half borosilicate, half soda lime according to my most recent calculations.
809888
I believe it's a blend of various forms of glass. They are delicate but have a heavy bottom. Not something you want to use for a house party but maybe something for a formal get together
1081008
Corning and another glass manufactures around 20 years ago change material for cook wears from soda lime to borosilicate.Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion, making them resistant to thermal shock, more so than any other common glass.So, I don't know why you mention ceramic.
1392442
I thought the exact same thing. Apparently at some point they changed to soda lime silicate. Coincidentally at that same point, there have been more cases of Pyrex shattering. Pyrex is no longer using the same quality of products. Pies should not have to suffer the same fate mine did. Soon I will be selling those silicon bracelets for pie awareness..Please see this article: http://www3.nd.edu/~rroeder/ame60646/slides/glasscookware.pdf
2158597
It is glass. We have had no issues with this and have found it easy to keep clean.
258854
It absolutely seems like glass to me. If it is plastic, I can't tell the difference. I'm not going to throw it to find out though. :)
1234349
If you are concerned about baking in glass, you could try to find a borosilicate glass pan rather than a soda lime glass pan. But if you can't find borosilicate glass, can you try ceramic, aluminum, or stainless steel? If you choose to bake with glass or ceramic, the usual advice is to avoid sudden temperature changes. Don't set a hot glass pan directly on a cool hard surface: use a fabric dishtowel or potholder in between. Don't scratch or scrape glass, and realize that if it survives a fall, it may still break later! Every pan has its limit: make sure the oven isn't hotter than the pan can take. I'm not an authority but this is what I've learned. Good luck! If you are concerned about baking in glass, you could try to find a borosilicate glass pan rather than a soda lime glass pan. But if you can't find borosilicate glass, can you try ceramic, aluminum, or stainless steel? If you choose to bake with glass or ceramic, the usual advice is to avoid sudden temperature changes. Don't set a hot glass pan directly on a cool hard surface: use a fabric dishtowel or potholder in between. Don't scratch or scrape glass, and realize that if it survives a fall, it may still break later! Every pan has its limit: make sure the oven isn't hotter than the pan... » Read More If you are concerned about baking in glass, you could try to find a borosilicate glass pan rather than a soda lime glass pan. But if you can't find borosilicate glass, can you try ceramic, aluminum, or stainless steel? If you choose to bake with glass or ceramic, the usual advice is to avoid sudden temperature changes. Don't set a hot glass pan directly on a cool hard surface: use a fabric dishtowel or potholder in between. Don't scratch or scrape glass, and realize that if it survives a fall, it may still break later! Every pan has its limit: make sure the oven isn't hotter than the pan can take. I'm not an authority but this is what I've learned. Good luck! « Show Less
756566
It's glass. These are usually for food storage. I can't imagine Libbey not meeting those requirements.Libbey would need to be contacted to find out specific information.