Funny Muffler is a muffler that only appears in the episode "Bubble Buddy." It is Sheldon's special inanimate friend.
It is a dark gray muffler with a hole in it.
Role in episode
When the Bikini Bottomites
threaten to pop Bubble Buddy
asks if any of them have a special friend. After Mr. Krabs
mentions his love for Nickel Buddy
, Sheldon looks at Funny Muffler and cries. This moment does not last long, as they still agree to pop Bubble Buddy.