Abstract: This invention provides a method for producing a storage tank from a resilient material, such as a fiber glass reinforced plastic, in which a member is formed to a cylindrical configuration at a first location, flattened to an oblate configuration and held in said oblate configuration while transported to a second location, and then released so as to resume its cylindrical configuration, whereupon by addition of a base and a top the tank is completed. The member may be formed in sections at the first location with the sections being flattened to varying degrees so as to fit one within the other during transportation. Similarly, the top and base may be cut into sections and nested with the sections of the flattened member during transportation.