Pyrex Snowflake Blue is a popular vintage pattern of Pyrex glassware. The design features a delicate snowflake motif in shades of blue on a white background. It was produced by Corning Glass Works in the 1960s and 1970s. Pyrex Snowflake Blue pieces are highly sought after by collectors today. https://expressionbrand.com/pyrex-snowflake-blue-everything-you-need-to-know/