We have all experienced sloshing, for example when waIking with a cup of coffee. Some beverages, such as beer, do not slosh as readily. This observation suggests that the addition of foam on top of the liquid may play a role in the sloshing dynamics. Using a model system, we show that the motion of the foam along the walls of the container damps sloshing through viscous dissipation. We conclude that it is much easier to carry beer than coffee.