In the large, many-staircased Arque building you enter early on in Chapter 3, there will be a room you have to pass through before exiting to the streets with a large whiteboard and a dead gunman sitting amongst a set of chairs facing it. To the left of the whiteboard is a table with a bunch of disposable coffee cups on it. Pick up or shoot all the cups until there's none left on the table and you'll get the achievement.