Introduced in 1915 by Corning Inc., Pyrex is still produced in the US over a century later.
The business later became part of Corelle Brands, a spin-off of Corning Inc., and by the time the firm's Pennsylvania factory celebrated its 100-year anniversary, it was producing 50 million pieces of the miraculous heat-resistant cookwear a year.
In 2019, Corelle Brands merged with Instant Brands, which is perhaps best known for its hugely popular Instant Pot appliance.