Krusty-O's is a brand of breakfast cereal endorsed by Krusty the Clown which prominently features his likeness on the box. The real KrustyO's, sold by 7 Eleven, were produced by the Malt-O-Meal corporation.
Krusty-Brand Cereal is the catalyst for the episode "'Round Springfield", when Bart swallows a "jagged metal Krusty-O" included in the box as a premium and is sent to the hospital. Later in the episode when Krusty holds a press conference to show that swallowing the jagged metal Krusty-O is not dangerous, he immediately begins to gag before he is informed he swallowed a "regular" Krusty-O, which he claims must be "poison". At the end of the episode, another box of Krusty-O's is shown with the promotion: "Flesh-Eating Bacteria In Every Box!".
Read more about this topic: Products Produced From The Simpsons