More than a thousand Starbucks employees went on strike on Thursday on what is one of the company’s busiest days.

Members of the Starbucks Workers Union are picketing outside more than a hundred stores across the country on what they say is the group’s largest single-day strike. The walkout falls on what’s known as Red Cup Day, when the coffee giant hands out limited-edition holiday reusable cups. They’re considered collector’s items and customers line up at the crack of dawn to get their hands on a decorated cup. It’s one of the coffee giant’s most profitable days on the calendar.

On Red Cup Day, thousands of Starbucks workers go on strike

No Starbucks for me today