Abstract: An assembable jouncing apparatus having a pair of portable and adjustable stanchions selectively positionable in space relation and operative to support a board therebetween at selective distances from the ground or floor; each stanchion including a board supporting member operative to receive and transmit maximum vertical and minimal horizontal force components to the stanchions from the board as it is downwardly deflected therebetween. The board being loosely retained between the stanchions by removable devices secure at each end portion of the board.

Abstract: A self-expandable, foldable and reusable container made of elastic material which is adapted to be collapsed progressively from top to bottom to a volumetric dimension substantially equal to the substance contained therein to minimize air space in the container. An air tight closure is tightened about an access opening in said container while the same is held in collapsed condition. The folds of said container are formed with sections of different geometry to effect progressive flexibility from the top to the bottom thereof.

Abstract: A resuable container made of elastic material which is formed with sections of different geometry wherein when the container is opened it will self-expand to a fully extended position. However, when pressure is applied to the top of said container it will progressively collapse from the top to the bottom thereof thereby allowing reduction of volumetric dimension substantially equal to the substance contained therein for easy access to that substance. An air tight closure is tightened about the access opening while the container is held in collapsed condition whereby a partial vacuum is then created therein.