Chartreuse, a centuries-old liqueur, is made by the Carthusian order of monks in the French Alps.
In 2019, the monks capped production to lower their environmental impact and focus on prayer.
"It used to be something you could rely on being available, so I never really paid much attention to it," Joshua Lutz, a loyal lover of the liqueur, told the Times.
According to the New York Times, the Carthusian monks implemented a production cap in 2019, in order to limit their environmental impact, and focus more strongly on solitude and prayer.
Michael K. Holleran, a former monk who oversaw Chartreuse production in the 1980s, told the Times.