You may have heard that uppercase PYREX and lowercase pyrex labels on cookware indicate what materials the items are made of.

If your grandparents loved Pyrex, there is a chance a piece of their collection just might be worth a small fortune today.

Add Yahoo as a preferred source to see more of our stories on Google. Pyrex serving dishes with flowers on them. - Danielle Skibola/Getty Images Vintage Pyrex cookware has become a cult favorite among ...

Add Yahoo as a preferred source to see more of our stories on Google. Iron, copper, and glass vintage cookware sets - Static Media / Getty There's nothing more thrilling to collectors than finding a ...

For Amanda Homrighausen, the best part of collecting antique Pyrex cookware is the hunt. When the 41-year-old enters thrift stores looking for glassware made by the century-old brand, she says her ...

Everyone loves a good kitchen hack, and one of the most popular examples concerns glass cookware. Between Twitter, Reddit, and TikTok, there are hundreds of posts asserting that all-caps PYREX is the ...

It’s not often that Hackaday brings you something from a cooking channel, but [I Want To Cook] has a fascinating look at Pyrex glassware that’s definitely worth watching. If you know anything about ...

There are a lot of vintage kitchen brands that are amazing thrift store finds, but some whole cookware sets can be extremely valuable. Plus, that set of heirloom cookware gathering dust in your ...