A portable thermal treatment and storage unit includes a housing with a thermal treatment chamber, and ports that provide a flow path between the chamber and an environment surrounding the unit to facilitate a flow of air into the housing, through the chamber, and out of the housing. The unit is configured to selectively open and close at least one port to limit or prevent the flow of air into the housing and through the chamber such that, when the at least one port is opened, the unit facilitates heat transfer between the flowing air and the food or beverage items supported by the support member so as to change the temperature of the food or beverage items. When the at least one port is closed, the unit insulates the food or beverage items to maintain the food or beverage items within a selected temperature range for a selected time period.