In Ireland, "the Black Stuff" is a widely used affectionate nickname for Guinness, the iconic dry Irish stout.  While its advertising leans heavily into the "black" moniker, the beer actually has a deep ruby-red hue when held up to the light, which comes from the use of roasted barley in the brewing process.

Billie Jean King famously used the stainless-steel Wilson T-2000 to win the 1967 U.S. National Championships (now the US Open). Her victory marked the first time a Grand Slam tournament was won with a non-wooden racquet, sparking a major shift in tennis equipment.