By the 1930s, Anchor Hocking Glass Corp. released its competitor brand Fire-King. But it’s the kitchenware made between 1950 and 1980 that seem to be most popular right now.

Introduced in the 1940s, Fire-King is Anchor Hocking’s brand name for glassware similar to Corning’s Pyrex. Fire-King was first made of annealed borosilicate, a low-expansion glass that could ...