When Lorelai, Christopher, and Rory arrive at the elder Gilmores’ house, Richard mixes the adults a martini, which became the go-to cocktail on Gilmore Girls. (In the picture, all the adults are holding martini glasses).
A martini is a cocktail made with gin and vermouth, garnished with an olive or a twist of lemon. Some trace its origins back to the Occidental Hotel in San Francisco in 1860, who made a similar cocktail named the Martinez; others to a bartender named Martini who worked at the Knickerbocker Hotel in New York around 1911. The martini soared in popularity during the Prohibition era thanks to illegal gin, and was the predominant cocktail mid-twentieth century. They fell out of favour in the 1970s, but became popular once again in the 1990s.