The Kool-Aid Man is the mascot for Kool-Aid, a popular drink. The character has appeared on television and print advertising as a fun-loving character, appearing to children and sharing his Kool-Aid beverage, as well as his catchphrase "Oh yeah!". He is a gigantic anthropomorphic pitcher, filled with Tropical Punch Kool-Aid and marked with a fingerpainted smiley face.
In the episode "Super School", one of the freeze-frame captions stated that Garfield and Kool-Aid Man agreeded that Garfield would drink him but he's still alive in other episodes for some reason.
In the episode "Bat Mitzfa Bash", Kool-Aid randomly jumped out of the wall and Aya drank him.
A parody of Kool-Aid Man was made in a commercial titled "Purple Flavored Beverage Man".