Power Rigid plastic reservoirs can be awkward to store, transport and get into certain places. IWS FlexiTank - Without Assembly Kit is a simple and elegant solution to those problems. The main tank fabric is made from thick, strong and flexible material with a zippered lid and the whole thing folds up flat, like a tent, for easy storage. The five support legs slide easily into ready-made vertical slots in the fabric and hold the FlexiTank in shape vertically.