Nesting Set of 5 Bauer Pottery Ringware Bee Hive Mixing Bowls USA 18 24 30. Add a splash of classic California color to your kitchen with this beautiful set of vintage Bauer Pottery nested mixing bowls. These are authentic pieces featuring the iconic “Ringware” (beehive) design and high-gloss glazes that made J. Chinese Yellow, White, Black, Ivory. Markings: Stamped “Bauer USA” on base with size numbers.