Abstract: A portable, flexible, fabric-composite-based, tank system with internal baffles capable for transporting water and other liquids on a non-dedicated truck is herein disclosed. A heavy textile tank is impregnated with a polytetrafluoroethylene (PTFE) is available in multiple sizes capable of being transported by pickup, flatbed or tractor-trailer trucks. The fabric tank have a series of internal inflatable baffles to aid in the stability of the tank by preventing sloshing of the liquid contents while traveling with the tank partially filled. The internal baffles inflate to sizes large enough to force liquids out of the tank through the discharge valve by displacing fluid with air without the need for a pump. When finished with use, the fabric tanks can be cleaned, dried, and collapsed for storage, thus allowing the truck's transport platform to be used for other tasks if necessary.