This cobalt blue tumbler was produced during the Depression Glass era of the 1930s, when American glass manufacturers created affordable, mass-produced glassware in vibrant colors. The distinctive geometric pattern with horizontal ribbing was characteristic of Art Deco design influences popular during that period. Companies like Hocking Glass and Hazel Atlas competed to produce attractive yet inexpensive tableware that brought color and style to American homes during economically challenging times.

Cobalt blue Depression Glass is particularly prized by collectors today for its striking color and relative scarcity compared to more common colors like pink, green, and clear. The geometric patterns and bold hues appeal to collectors of both vintage glassware and Art Deco design. These pieces are valued for their historical significance as artifacts of American manufacturing and domestic life during the 1930s, and they remain popular decorative items that evoke nostalgia for mid-20th century American culture.