"Claes Oldenburg's Apple Core sculptures, a series created in collaboration with Coosje van Bruggen, are among the artists' significant contributions to public art, representing their interest in transforming everyday objects into monumental sculptures. The Geometric Apple Core (1991), specifically, is an excellent example of this series, standing tall with dimensions of 92 inches by 55 inches by 42 inches (approximately 233.68 cm × 139.7 cm × 106.68 cm). This sculpture, like others in the series, is made from materials such as latex paint, polyurethane, and steel, emphasizing the contrast between the everyday ephemeral nature of an apple core and the permanence and durability of the materials used​ (SFMOMA)​.

The Apple Core series is part of Oldenburg and van Bruggen's broader practice of creating large-scale sculptures that elevate mundane objects to the status of art, encouraging viewers to reevaluate the ordinary objects in their lives. Their sculptures often inspire humor and surprise through their exaggerated size and the shift in context from everyday life to the public or museum setting.

These artworks are consistent with Oldenburg's manifesto-like statements from 1961, where he expressed his desire for art that engages directly with everyday life and materials, turning familiar objects into something unfamiliar and provocative through changes in scale and context. The Apple Core sculptures embody this philosophy, transforming a simple, perishable object into a durable, thought-provoking work that invites viewers to ponder the relationship between art, everyday objects, and their environment​ (SFMOMA)​.

The Apple Core sculptures can be found in various locations and collections, including the San Francisco Museum of Modern Art (SFMOMA), where they are part of the Doris and Donald Fisher Collection. Although not always on display, these pieces remain an important part of the dialogue between art and public spaces, reflecting Oldenburg and van Bruggen's lasting impact on contemporary art and public sculpture​ (SFMOMA)​."