In the 1930s, Corning’s chemists invented another type of clear glassware that the company used to make stovetop cookware marketed as Pyrex Flameware. Products, which were tinted slightly blue, included saucepans and skillets with detachable handles, double boilers, a teakettle and a teapot, coffee percolators, bottles, bowls, and refrigerator storage containers.


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