The item is a vintage Glasbake mixing bowl, specifically the Sunbeam 19CJ model, made of white milk glass. It was designed for use with a stand mixer. Material: Milk glass Model: Sunbeam 19CJ Era: Possibly 1940s-1960s Size: Approximately 8.5-9.5 inches wide and 4-5 inches tall Features: Handles on the sides This ball is very, very clean for being very very old.  Compatibility: Designed for vintage Sunbeam Mixmaster mixers. The bottom says glass bake made for sunbeam 19 CJ.