A 1943 Corning advertisement in Time magazine states:
“Months ago the armed services asked Corning to develop a glass out of which messware could be made on a fast production basis. Naturally the product had to be tough and strong because the average K.P. or galley detail isn’t noted for gentleness in dishwashing.
The result surprised everybody – even Corning. The dishes are smooth and nice looking. And surprisingly tough. In laboratory strength tests, for example, they are dropped 5 to 7 feet to prove their toughness.”
Often, military customers customized Corning’s standard commercial patterns by including their insignia on the crest of plates. Customized military patterns, such as those shown below, are a favorite for many collectors. PYREX Passion II: Vintage Opal Dinnerware, Beverage Items, and Storage Containers contains over 50 customized opal dinnerware patterns produced for restaurants, institutions, and the U.S. military.