the older ones were made of tempered glass. I used to sterilize them to make jam. Are these tempered glass as well?
894892
I'm not sure but we have always called them French jelly jars. Can I assume then that they are tempered?
894893
I've broken a few over the past 40 or so years and don't notice any difference in quality or tempering. I do put them in microwave full of water and heat to boiling for tea. I don't believe they are tempered like clear glass arcoroc mugs which I have seen bounce off a concrete floor without damage.
1637826
Last Checked these were glass jars. Manufactures do change the Jar with out informing us until we receive the product. Please Consider "This,That & WhatNots" LLC for your purchase
1354447
When I purchased them it was I can't speak for now. Hope this is of some help to you. I liked the jars and they were of good quality. They were packaged well and none were broken.
402908
These were not 'high quality', meaning that they can have micro bubbles and fractures and/or temperature stress. If you expose them to high heat and they have a flaw, it will break. The price of these dictates that the are not tempered, or anything else that would give reasonable durability and/or temperature resilience. USE AT YOUR OWN RISK.
167133
One of the ones I bought were glass. Personally I wouldn't buy glass... But y child bangs everything :)
1942678
Not sure about the tempered glass but I pour boiling water over my teabag every morning & it's been fine. The only problem I've had is being very careful when washing them; they crack & chip easily but I'm on my second set of 4. I really like them; they hold about 16 0z of fluid each.
1377684
They're glass, so yes, they're "food grade" although bottles aren't classified as "food grade." I always boil both the bottles and the droppers for a few minutes in water to sterilize them.
1618276
They are glass, but not just silicon but 'borosilicate', which means they're like the same glass used for pyrex these days. This increases durability and the ability to handle thermal shock.
1879173
wait, i do not know that for a fact. i thought they were both dishwasher and microwavable but nothing is stated on the bowls. When I look at the bowls on line they say dishwasher safe and BPA. Thus I am not sure about nuking them '
1017973
I don't know if they are tempered but I have dropped them once or twice each and they did not break. Obviously they withstand high temperatures. Both are still serving me well.
330840
Yes, they're made of glass. We use them for fermenting foods, making tea and storing food items.
545147
They are glass. They are sturdy glasses, but they have bubbles in the glasswork and I did not like that.
274960
Mine are Type 7 Other, which is probably not going to help you. I imagine that they are safe for food. However, I find them quite brittle and several of mine have broken. If you are careful in handling them (e.g., never, ever try to pry out hardened brown sugar), they are fine for casual use. The large openings are nice.
777087
ours were glass but note there is a very sharp edge on the stainless where the grommets insert. You will get cut if you try to lift them before inserting the grommets. I do not know if the newer version of the shelves are glass or not.
1046417
They're glass, but I've bought two sets and both times the pitcher cracked over time. My glasses are still ok though.
2137256
The ones I got were sealed. I do not believe you can take them apart without breaking them.
1392443
I looked it up on the internet. They no longer used borosilicate. They now use tempered glass.