I had a 50 gallon hard container that fit in front of the 5th wheel. Now I have 2 collapsible 45 gallon containers that fit into a plastic tub when not in use. With the hard container I originally used an air compressor to pressurize the container to move the water. I installed an air valve in the cap.I gave that one to my son. I switched over to a pump a long time ago and use it with the collapsible ones. The one collapsible is long and round when full of water and sits in front of the 5th wheel and the other one fits between the 5th wheel and the Tgate, when we are staying in a place for a while. Most of the time we boondock.