A supplemental cooling device for a beverage container. Ice and water are introduced through a top opening in a housing which is wider than the outside
diameter of the container, so the container is freely inserted into the housing. A lid
assembly with a compliant seal is removably threaded to the housing. When in a relaxed and open position, the seal has an opening which is also wider than the outside
diameter of the beverage container. After inserting the container, the lid
assembly is tightened against the housing, and the compliant seal is deflected against the beverage container to isolate the annular space between the housing and beverage container, thereby allowing the housing and beverage container to be tipped for drinking without spilling the
coolant. Once the drink is consumed, the compliant seal may be disengaged so that it is open again, permitting easy removal of the beverage container.