For the purpose of automatically vending cups of cold drinks, ice being directly put into a cup, source powder or a concentrated source liquid, and cold water are required for mixture. Ice is made by an ice making machine. Cold water is prepared by cooling city water with ice made by the ice making machine. To that end, a cylinder for stocking ice formed of apertures at a portion of the peripheral wall thereof for allowing a flow of the water therethrough and a cold water tank for storing cold water around the cylinder are provided. Ice made by the ice making machine is selectively supplied into a cup for vending or into the ice storing cylinder for the cold water. The cold water is held in the cold water tank and is withdrawn through the ice storing cylinder while the same is in contact with the ice stored therein. The cold water is mixed with the source powder or the concentrated source liquid and the mixture is guided to a cup together with the ice.