Patent ID: 8535936

Claim:
A vessel comprising: a flexible first surface having at least one edge; a flexible second surface adjacent the first surface having at least one edge fixedly joined to the at least one edge of the flexible first surface, thereby forming a space between the flexible first surface and the flexible second surface, the space including: a fluid containment portion extending from a bottom of the vessel upward to about half an overall height of the vessel, the fluid containment portion including at least two contact points between the flexible first surface and the flexible second surface at which a portion of the flexible first surface is in contact with a portion of the flexible second surface, forming a continuous void around and between each of the at least two contact points and between the flexible first surface and the flexible second surface; and a headspace portion extending from a top of the vessel downward to the fluid containment portion between the flexible first surface and the flexible second surface, the headspace portion being free of contact points between the flexible first surface and the flexible second surface; and at least one aeration tube extending from a top of the vessel between the flexible first surface and the flexible second surface and into the fluid containment portion.