Calagione had informal talks with Jim Koch, co-founder of the Samuel Adams brewing Boston Beer Company, at the annual Extreme Beer Fest in Boston. Within a few months, they were purchased by Boston Beer Co. Dogfish Head announced the acquisition by the Boston Beer Company for $300 million on May 9, 2019. As part of the merger, Calagione and his wife, Mariah, converted their Dogfish Head stock into Boston Beer Co. stock, thereby becoming the second largest non-institutional owners of the merged companies. Products Dogfish Head tends to produce experimental or "extreme" beers, such as the tongue-in-cheek "Liquor de Malt", a bottle-conditioned malt liquor, which typically comes in a Dogfish Head brown paper bag. Dogfish Head products often use non-standard ingredients, such as green raisins in Raison D'Être ale. Some beers, including the WorldWide Stout, 120 Minute India Pale Ale, and the raspberry-flavored strong ale Fort, are highly alcoholic, reaching 18% to 20% alcohol by volume (typical beers have around 3% to 7% alcohol by volume). One of Dogfish Head's more notable odd beers was a green beer called Verdi Verdi Good, produced in 2005 and sold only on draft. The beer was not colored green artificially; rather, the green color was derived from brewing a Dortmunder style beer that contained spirulina, or blue-green algae. Pangaea, first released in 2003, is a Belgian-style strong pale ale made with ingredients from every continent on Earth, including: crystallized ginger from Australia, water from Antarctica, basmati rice from Asia, muscavado sugar from Africa, quinoa from South America, European yeast, and North American maize. The name Pangaea refers to the eponymous super-continent which existed about 250 million years ago. The New York Times in 2010 profiled the brewery's efforts to make chicha beer, a traditional Latin American beverage made from maize, which requires chewing the corn and spitting it in a communal pot. In 2020 the brewery began producing hand sanitiser in response to the COVID-19 pandemic. IPAs Dogfish Head's best-selling product is its line of India Pale Ales (IPAs), which are offered in eight varieties: 60 Minute IPA (denoting the length of the boil with which hops are continually added) 90 Minute IPA 120 Minute IPA Sixty-One, a beer-wine hybrid brewed with Syrah grape must Aprihop, a Spring seasonal IPA brewed with apricots Burton Baton, an imperial oak-aged IPA Hazy-O, a hazy IPA brewed with oats and wheat 75 Minute IPA (cask or