On "Seinfeld", what kind of "Pez" dispenser sent Elaine into hysterics?

On "Seinfeld," a Tweety Bird Pez dispenser sent Elaine into hysterics.

The gag occurs in "The Pez Dispenser," the 31st episode of the sitcom. Jerry discovers that Elaine is attending a piano recital given by George's girlfriend, Susan Ross, and brings a Tweety Bird dispenser with him. During the performance, he places it on Elaine's leg, where its absurd appearance distracts her and makes her laugh uncontrollably.

Elaine's laughter becomes increasingly disruptive, embarrassing Susan and forcing Elaine to leave the recital. The joke depends on the contrast between the solemn concert setting and the brightly colored cartoon-character candy dispenser. Tweety is a familiar Warner Bros. character, which makes the prop instantly recognizable even though the episode never treats it as an important object.

The episode is often remembered simply as "the Pez episode," but its official title is "The Pez Dispenser." The dispenser is not a random candy prop: it is the specific Tweety Bird design that triggers Elaine's reaction.