Abstract: A fillable kettlebell is disclosed that can be used as an exercise device. When empty or “unfilled” the fillable kettlebell has a relatively small profile and is lightweight and thus very transportable particularly when compared to traditional kettlebells. Upon filling to the desired/user selectable weight, the fillable kettlebell provides superior functionality to conventional kettlebells as it will not rust and cause as much damage upon impact as traditional kettlebells. The fillable kettlebell can be made of a flexible material/fabric/webbing with a closable opening to accept and retain matter that has the desired weight for the specified volume. The fillable kettlebell can have attachment members that coupled a handle to the container. The handle allows a user to lift the kettlebell via a force exerted on the handle. After filling, a fastening member proximate to the closable opening can mechanically secure the fill port thereby securing the retained matter in the container.