Patent ID: 7506389

Claim:
A sitting apparatus, comprising: a first section having a top, a rear, and a hollow interior that defines a first single cavity that is directly filled with a first fluid; a second section attached to the top of the first section and having a top surface, and a hollow interior that defines a second single cavity that retains a second fluid; and a backrest attached to the rear of the first section in a manner such that a top surface of the backrest extends above the top surface of the second section, the backrest having front and rear surfaces that are completely parallel with each other, a length or width that is substantially parallel to a vertical axis, and wherein the backrest does not completely surround the respective perimeters of the first and second sections; wherein the first fluid is air, and the second fluid is a liquid; and wherein the first and second sections have the same size and shape, and are oriented horizontally and transverse with respect to the backrest.