The unofficially named Midnight Bloom was available to the consumer market in late 1970. Released on the 1 ½ quart Oval Casserole (043), Midnight Bloom has a solid blue dish with a black opal ware lid. The deep blue stylized floral design reminiscent of a lily flower is printed on the top of the black lid. Midnight Bloom’s design is in contrast with the popular bright colors of other designs in the 1970s.
Corning Glass Works offered its first patterned opalware gift set in 1953 when the Heinz Baking Dish was sold in grocery stores. Widespread distribution of promotional patterns occurred after the overwhelming success of the 1956 release of seasonal “decorator casseroles.” Using existing Pyrex shapes, gift sets featured new patterns offered for a limited production time. They often came with mounters, cradles, or candlewarmers and were advertised in the spring to appeal to Mother’s Day and summer wedding shoppers and in the fall to give the holiday gift-buyers something new. Corning continued to produce gift sets through 1983, creating nearly 135 different gift set patterns during that time. Corning intended these pieces to be sold for a limited time, and directed retailers to remove older, unsold promotions from the shelves.
Often, patterns used for these gift items were unnamed, or given names descriptive of the dish’s purpose, like “chip and dip set.” Collectors over the years have assigned names more reflective of the specific pattern.