A method of serving a drink to a person is disclosed. The method includes the steps of supplying the person with a drinking vessel having a closed bottom, an open top, and a sidewall extending between the bottom and the top. The drinking vessel is capable of holding a predetermined volume of liquid. The person is also supplied with a pre-packaged, flexible container of ice and air. The container has a volume of less than about 20 cubic inches. The method further includes supplying the person with a liquid which can be poured through the open top of the drinking vessel.