When the environment issue was not such a big thing yet, companies were getting their employees coffee in plastic of paper cups. Nowadays however, the environment becomes more and more important and we have to think 'green' in order to become appreciated. One consequence of this is that people have to drink their coffee out of stone or metal cups, at least the ones of a kind that lasts. Disadvantage of this is that those cups need to be cleaned and that is where it often goes wrong. In many companies this is not thought of and it shows. Dirty cups all over the place. Cleaning them is clearly an issue.