The present invention provides a new and unique portable, self-contained, fluid system (10). The portable, self-contained, fluid changing system may be used as a fluid changing device for changing a fluid such as oil or another suitable fluid in a container of a boat, recreational vehicle (RV), automobile or other suitable military, agricultural or industrial device. Alternatively, portable, self-contained, fluid system may also be used for providing fluid such as water or other suitable fluid for cleaning or showering. Moreover, the portable, self-contained, fluid system may also have a reversible electric pump (22) that may be adapted or switched for pumping in either direction once the pump is affixed on the reservoir (12) so the system may be sold and marketed for use in a fluid changing type of device or in a water providing or cleaning type of device consistent with that described above.