The idea continues to occupy Oldenburg in a number of drawings between 1969 and 1973. It recurs for instance in Notebook Page #3184, Study for Tube Supported by its Contents (1971). In this vibrant drawing, the piece is integrated in a park-like landscape and enlarged to monumental scale. The toothpaste is now a straight rod, coiled twice near the ground where it is anchored, and the tube rises directly above it like a burning flame. The enigmatic inscription “Note – projects = myself ” at the bottom tantalizingly establishes Tube Supported by its Contents as a self-portrait. Oldenburg frequently spoke of the toothpaste works as representations of himself—as an artist who “takes off his cap and oozes out his content” [4] — and those contents supporting him. He wistfully envisioned a moment when, like an empty tube, he’d be discarded. [5]
Over the course of the late 1970s and early 1980s, Oldenburg embarked on a series of models of Tube Supported by its Contents, showing various dynamic solutions applied to the basic elements of tube and paste. In these versions, the tube now seems to flutter in the wind like a pennant. As he progressed with the form, then, Oldenburg continued to undermine the conventional elements of public sculpture (verticality, solidity) and to emphasize “indefinite form”: oozing, coiling, floating, fluttering.