“Depression glass” was manufactured mainly between 1929-1940’s. It was (and is, if you can find it) an inexpensively made glass turned out by machine in a variety of colors. There are probably 100 different patterns. It was originally sold inexpensively or given free at the movies or in retail boxes of food or soap as an incentive To purchase a product during hard times. Pretty pinks, greens, blues and yellows are among the colors made.