The present disclosure provides a flotation device for ensuring that a container held within the device floats upright in water. The device is a ring with an opening to receive and securely accommodate a container. The ring is comprised of an elastic material to accommodate a variety of sizes of beverage containers and containing a plurality of buoyant inserts such that the ring forms a regular polygon shape. The ring further comprises spacers in between the buoyant inserts for ensuring that the buoyant inserts maintain approximately equidistant spacing, and the floatation device holds its regular polygon shape.