Abstract: A table with a height-adjustable component comprising a vertical support, a height adjustable mechanism, and a height adjustable part, wherein the adjustment mechanism comprises at least two grooves around the perimeter of the vertical support; an elastomeric ring which fits snugly within the grooves, and can be stretched to move from one groove to another; and a slide which fits over the vertical support and has a stop which rests on the top of the ring and also prevents lateral movement of the ring out of the desired groove. The height-adjustable part is affixed to or formed as part of the slide, and may comprise a footrest or a tabletop. A method of manufacturing and using the same is also described.