Abstract: An inflatable beverage container insulating jacket, more particularly, a jacket which when collapsed conveniently stores in a credit-card sized pouch for carrying in a wallet or purse. The insulating jacket includes a generally cylindrical inflatable wall and a base unitarily attached to the wall, which when inflated forms the receiving space for the container. Both the wall and the base are made up of an interior partition and an exterior partition peripherally attached to one another, thus defining an interiorly disposed chamber for rigid inflation of the wall. An inflation valve having a minimal dimension, such as a resealable compression-type zipperless closure, is attached to the wall along a top edge of the wall, the valve permitting rigid inflation of the unitary base and wall by virtue of a plurality of interconnected air cells. Each air cell is defined in the wall and base by a plurality of tacking welds.