Warhol

In an IDW Publishing backup strip that appeared in multiple issues of different IDW comics, notes that before, Warhol tried joining the  - which turned out to simply be a can of Campbell's Turtle soup

Trivia

 * Warhol is obviously named after late American artist Andy Warhol, and it (his?) appearance as a can of Campbell's turtle soup is a reference to Warhol's famous 1962 painting, Campbell's Soup Cans].