Bars with large wine glasses may encourage more drinking, a new study found, but this doesn’t necessarily bring in greater profits. In an effort to understand how portion size affects social drinking, a team from Cambridge University’s Behavior and Health Research Unit created a trial with 21 pubs. They learned that when the largest glass of alcohol (typically around 8.5 ounces) was taken off the menu, patrons didn’t order more drinks to make up the difference. “People tend to consume a specific number of units—in this case glasses—regardless of portion size,” says author Dr. Eleni Mantzari in…