Pyrex: The 1920s

Regan Brumagen

The first years of Pyrex production were a success. More than 4 million Pyrex dishes were in kitchens all over America by 1919. The consumer division of Corning Glass Works continued to add new shapes and sizes, advertising over 100 different Pyrex styles (Good Housekeeping, February 1922). Ads assured American consumers that “no home can have too much” Pyrex. Corning’s sales department urged merchants to take an aggressive sales approach toward buyers who already had a few Pyrex products:

We have invested over a million dollars in advertising…How are you capitalizing on this…? By selling one or two pieces of PYREX to the woman who asks for it, or do you realize that a user of PYREX is the best possible customer for PYREX and continue to sell her until her home is a PYREX home? (Advertisement, Hardware Age July 27, 1922)

Pyrex Nursing Bottles

Pyrex Nursing Bottles, Corning Glass Works, Corning, NY 1923-1935. 2010.4.817

New products like baby bottles, teapots, and measuring cups were added to the Pyrex lines, as well as a set of junior Pyrex dishes, “The Pyrexette” for children. In 1920, Pyrex ovenware was a major product line for Corning Glass Works, pulling in about a quarter of the company’s total profits.

Pyrex Liquid Measuring Cup

Pyrex Liquid Measuring Cup, Corning Glass Works, Corning, NY, 1926. 2010.4.743

As the decade rolled on, however, sales began to fall off. Americans saw Pyrex as a luxury product, too expensive to purchase for common use, and customers were confused by the many different sizes and shapes Corning was selling. Realizing Pyrex needed a jumpstart, the company developed a new marketing strategy, based on recommendations from outside experts. They cut 10 products from the line and focused ads on the five most popular dishes. They also moved away from extolling the scientific wonders of Pyrex and instead focused on what consumers wanted in a dish—easy to clean, versatile, energy efficient, and beautiful.

They moved Pyrex off the shelves of hardware stores to expanded presence in department stores where their urban customer base shopped. Ads for Pyrex no longer identified Corning Glass Works as the “world’s largest makers of technical glass” but as the “originators and Patentees of oven glassware.”

But the company knew these strategies were not enough. Corning also had to drop prices, and that would require a manufacturing solution. They put more research into developing a fully automated production line.

Promotional booklet for nursing bottles

Promotional booklet for nursing bottles, Corning Glass Works, 1929, Gift of World Kitchen. CMGL 142579

As the end of the decade approached Corning was still a few years from fully automated production, and continued to look to customers for feedback on improving the Pyrex line of products. In 1929, the company hired Lucy Maltby, a professor of home economics and a Corning native, to manage consumer services and delve into the mysteries of consumer needs and tastes. And, as it turns out, Maltby’s influence was to be more powerful and lasting than anyone could have predicted.

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Interested in learning more about Pyrex? Visit and check out our exhibit, America’s Favorite Dish: Celebrating a Century of Pyrex, on view at The Corning Museum of Glass June 6, 2015 through March 17, 2016.