I picked this product up at Target at the recommendation of a friend after having difficulty maintaining water supply during a 8 day camping trip. This was exactly what we needed. We were able to fold it down small enough to fit into a backpack pocket for the walk in. Once there we filled it at the springs and were able to use our purifier through the large opening that the port screws into. We sat the container up and it worked as well as the hard plastic containers.