By the 1930s, Hazel-Atlas had fifteen plants (plants included those in Clarksburg, WV; Zanesville, OH; Ada, OK; Montgomery, AL; Oakland, CA; Pomona, CA and other locations) and was a sizable glass manufacturer. Hazel-Atlas manufactured tremendous quantities of "depression" pressed glassware in a wide variety of patterns throughout the 1920s, '30s and '40s. They also produced many of the white milkglass "inserts" used inside zinc fruit jar lids, as well as many types of milkglass cold cream jars and salve containers. Also an important maker of a very large variety of bottles and jars for the commercial packaging industry. "Atlas" was the name brand of their most popular line of fruit jars for home canning. Hazel-Atlas, at that time the third largest producer of glass containers in the U.S. (shipping nearly 10% of the market's glass containers), became a subsidiary of the Continental Can Company in 1957. The acquisition was challenged under the Clayton Antitrust Act in a case that was eventually decided by the U.S. Supreme Court in United States v. Continental Can Co.. It continued to make containers, glassware and tableware into the 1960s. In 1964, 10 of the 12 H-A plants in operation were sold to Brockway Glass Company, and it is unclear if the remaining two plants used the H-A trademark after that year.
Hazel-Atlas produced dozens of different patterns, with unique names. The Hazel-Atlas mark, usually placed on the back of the product, is an "A" nestled underneath an "H". The mark was reportedly first used in 1923, according to trademark office records quoted by Peterson (400 Trademarks on Glass).