1940's Pyrex Primary Colors Original Mixing Nesting Bowls ~ Set of 4 ~ Vintage | eBay
Vintage Pyrex Primary Colour Opalware Mixing Bowl Set, Corning Glass U – Jack's Daughter of All Trades
Special--$3.50 Pyrex Ware Color Bowl Set | Pyrex
Amazon.com: VINTAGE 1940'S PYREX PRIMARY COLORS MIXING BOWL SET - Blue 1 1/2 Pint, Red 1 1/2 Quart, Green 2 1/2 Quart & Yellow 4 Quart - SET OF 4: Home & Kitchen