Abstract: A device for using the heating and cooling system of a car to control the temperature of a beverage in a container, such as a can of soda. A sleeve of soft foam has a series of channels formed on its inside surface. Ribs are disposed between the channels to hold the can in the sleeve. The channels receive air (warm or cool, as desired) directed to the channels from the lower end of the sleeve. The sleeve is preferably used with a holder designed to force air flowing horizontally from a vent of a car into the vertical channels of the sleeve.