Is the glass borosilicate?
1703824
Hello, Maureen, Directly from http://www.glasslockusa.com/what-is-glasslock : "GLASSLOCK is made of silica, soda ash, limestone and other natural components, making it eco-friendly and recyclable. It is BPA free and does not contain any harmful environmental hormones." Hope this helps, Gemini
1878049
Yup, the whole thing is glass. It's very pretty. I put plants in them and hung them in my big living room window.
2098030
It looks like glass but nowadays is difficult to be certain. I would say yes based on the temperature of the material. Glass is always cooler than plastic.
627373
Yes, glass. It has been banged around in my kitchen. Seems quite durable. No breakage. This is the best one we have ever had. The last two metal ones were disappointing. This has been wonderful.
372470
Believe it or not it is actually glass! The rest is all metal. I just got another one for a Christmas present ( it came in two days!) as we were so pleased with the construction and how it worked.
1244314
No it doesn't and when I purchased it, I thought it was glass, however, it's clear plastic.
1113223
Yes it is. Unless they have changed since I got mine it is glass and metal.
1531479
No they are not glass. They are resin.. I have used them several times and they work fine.
43813
Yes. The glass used for Lifefactory baby bottles is called borosilicate glass. Borosilicate glass is made of the following components: 80% silica, 13% boric oxide, 4% sodium oxide, and 2-3% aluminum oxide.
866173
No. It is glass on glass. I use them for a bath salt bar in my boutique. No issues!
1070499
It's not glass. it is like plexi glass. its nice and clear like glass but more durable than glass. a lot harder to break it. when you touch it it can appear to feel and sound like glass especially if you never came in contact with plexi glass before. It is not glass though.
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.
1316203
No it is not. this was very easy to put together the glass is hard like acrylic and I am pleased that I bought it
637363
I do not see any markings that indicate that these lids are BPA-free. The bigger concern is the composition of the glass itself. Corning divested its interests in 1998 and, with that, the original formula of borosilicate glass was changed to soda-lime glass, a cheaper and more volatile composition. http://en.wikipedia.org/wiki/Pyrex. I have both the original and current version of these ribbed glass storage bowls. The earlier is heavier and will likely outlast the modern version by generations.
978724
Should Imagine so,most Glass is,since I don't own a Microwave Oven can't say absolutely
1034351
No it is not made of glass. It is made of a good rugged plastic, both parts. Measurements are embossed. An excellent kitchen accessory.
593541
No sorry it is glass, mine was broken when I got it. Was not bubble wrapped or anything. So may be good insulator, but like the replys will not take any bounce or drop at all. If you get it not broken that is ha ha