The old stereotype of the latte-sipping liberal could have some basis in reality. It turns out liberals really do drink more lattes.

Researchers from the Annenberg School for Communication at the University of Pennsylvania surveyed 1,500 Americans about their coffee preferences, political ideology, household income and attitudes toward globalization and found that liberals drink more lattes.

A majority of Americans on both sides of the political spectrum preferred regular brewed coffee to lattes, but those who do drink lattes were more likely to be liberal, the study found. “Our results led to a fundamental reinterpretation of what it means to be a ‘latte liberal,’” the researchers found.

The researchers considered numerous theories for the “latte liberal” phenomenon, including the availability of lattes in a person’s neighborhood, household income and gender. While all of these were predictors of latte drinking, they did not explain the relationship between lattes and liberals.