Set of four Pyrex milk glass coffee cups with Crazy Daisy pattern.

Pyrex, a brand of heat-resistant borosilicate glass bakeware and cookware, was introduced by Corning Glass Works in 1915. It quickly became a staple in American kitchens due to its durability and versatility. Over the decades, Pyrex produced a wide array of glassware, including decorative patterns that have become highly sought after by collectors.

The 'Spring Blossom' or 'Crazy Daisy' pattern, characterized by its delicate green floral motif, was produced by Pyrex from the late 1960s into the 1970s. This pattern was applied to various kitchenware items, including these milk glass coffee cups, making them popular for everyday use and as collectible pieces reflecting mid-century kitchen aesthetics.