Abstract: The present invention provides, in at least one embodiment, a collapsible kettlebell system featuring a collapsible bladder like structure that can be filled by a liquid such as water, metal shavings or shot, sand and other appropriate substances. A handle is provided as a point of grip by the user. The handle includes an internal support structure that keeps the collapsible bladder in place. The internal support may also include a cavity for an optional/additional weight.