Abstract

A container has a body member having a pair of flat opposite major surfaces and an elongated handle having a longitudinal axis parallel to the planes of the major surfaces. A circular hole for receiving a shaft is formed substantially in the volumetric center of the container and the hole is surrounded by a key device to lock the shaft in the container. The container has an opening for filling and a cap for closing the opening. Preferably, the axis of the handle is located nonsymmetrically between the planes of the major surfaces and is supported by structure integral and continuous with, but narrower than the sidewalls of the container between the major surfaces. Preferably in the end of the container opposite the handle there is a slot communicating with a cylindrical hole in the container so that a rubber or metal resilient member may be inserted through the slot and secured by a dowel in the cylindrical hole. Several such containers may be easily stacked and transported to any location, filled with water, sand, concrete, etc., and used in combination with a shaft as a bar bell or in combination with a rubber band or spring as a resilient force exerciser.