Are these pieces made of the new Pyrex glass formulation that shatters or the old one (borosilicate) that is safe?
1851703
according to Consumer Reports, January 2011, borosilicate was phased out in the 1980's. The claim is that the new glass will not shatter any more easily
1542718
A doctor recommended Glasslock or LocknLock. Some of the reviews made me want to stick with the Pyrex.The Anchor Hocking lids that I have crack and don't say "BPA free". It's been a while since I bought them. But my many Pyrex lids that are just as old are all fine except one.
1081006
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.
2212244
Duralex was a French glassmaker that originated tempered glass which, when it reached America, showed up as borosilicate glass, more popularly known as Pyrex or similar trade names (at least that's what I recall from glassware used in high school chemistry lab). We have had this nested Duralex set for ~2 years & despite being "dropped" a few inches onto a granite counter when drying these are remarkable, durable bowls that still look like new.
319817
"borosilicate glass": Simax, Borcam, Borosil, Suprax, Kimax, Pyrex, Endural, Schott, Refmex. in use since 1893, this is cheap and standard for cookware. you could not make this out of "non-borosilicate glass"
493342
I never had one of these made from a ceramic (glass?), as I did not want something that might break if I dropped it. That is why I purchase the metal ones. I have been quite happy with the metal ones; having not only bought one for myself, but also several others as gifts for family and friends.
1365628
i would not. it's made out of glass, maybe high heat resistant glass similar to pyrex, but i wouldn't bet on it.
218172
I do not know. This is not a utensil that is impervious to heat like Pyrex glass. It could break. You will have to ask the maker, Dansk Christianshavn.
1903202
Glass, but not the toughest glass around.Be delicate with this kitEdit: im pretty sure its glass due to the way it cracked, just my guess.
2125089
As others have said, it's typically due to "operator error". It can happen to any brand; Pyrex is just the most popular, so got all the negative press. As mentioned, extreme temperature changes can cause it, as well as direct burner heat if the piece isn't meant for that. Also, it's worth noting that it can be caused by moisture trapped in tiny nicks or cracks being heated, expanding, and "exploding" the glass. That's what all the attention was about a couple of years ago. Make sure your glass pieces are thoroughly dry before use to prevent this. I've been using Pyrex and AH glass for 40 years, and my mom for a lifetime or two before that and we never had anything break or explode this way. As others have said, it's typically due to "operator error". It can happen to any brand; Pyrex is just the most popular, so got all the negative press. As mentioned, extreme temperature changes can cause it, as well as direct burner heat if the piece isn't meant for that. Also, it's worth noting that it can be caused by moisture trapped in tiny nicks or cracks being heated, expanding, and "exploding" the glass. That's what all the attention was about a couple of years ago. Make sure your glass pieces are thoroughly dry before use to prevent this. I've been using Pyrex... » Read More As others have said, it's typically due to "operator error". It can happen to any brand; Pyrex is just the most popular, so got all the negative press. As mentioned, extreme temperature changes can cause it, as well as direct burner heat if the piece isn't meant for that. Also, it's worth noting that it can be caused by moisture trapped in tiny nicks or cracks being heated, expanding, and "exploding" the glass. That's what all the attention was about a couple of years ago. Make sure your glass pieces are thoroughly dry before use to prevent this. I've been using Pyrex and AH glass for 40 years, and my mom for a lifetime or two before that and we never had anything break or explode this way. « Show Less
806984
I only use the current Pyrex to a maximum of 350 and then I wear a welders hood and gauntlet gloves and a leather apron when handling it in case it explodes I will not be injured by hot glass and food. I usually just use my Borolux or Arcusine dishes that can be heated up to 650 then I don't have all the protective gear since those dishes will not explode.
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.
1853612
It is now made of glass. The older version was made of plastic. It works great!
2209074
It appears to be real glass, but it is a lot thinner than Pyrex. It feels very fragile. I would not buy it again.
985919
the borosilicate glass itself is freezer safe but there is a thermal barrier between the layers with an unknown sealant so I would not risk it
2112318
No they're not. When you're brewing Kombucha, the temperature change wouldn't be sufficient to crack regular glass, so borosilicate glass isn't necessary.
1154380
To date, I haven't had any problems. So far, so good with the borosilicate glass.