Abstract: A large container having a rigid wall constructed of plates and an inner, fluid-impermeable film that covers the inner surface of the plates, so as to provide a sealed interior space of the large container. Multiple sections of film are used to cover the plates, either as a piece of film that is provided on each individual plate or as a larger sheet that extends over a plurality of plates. The pieces of film are dimensioned such that adjacent sections of film have an overlap section, so that overlapping sections can be affixed to each other in a manner that forms a fluid-impermeable sealed seam.