Burnie and the Cup

The Burnie and the Cup story is about why Burnie never finishes his drinks.

What happened?
In Episode 169, Burnie explains why he never finishes his drinks like the Coke cans he leaves everywhere. In the story Burnie explains that he was drinking with his buddies on South Padre Island. He later goes to pick up his cup of beer till he realizes that it wasn't his beer, it was someone elses spitcup. Yet he didn't even figure out it was a spit cup till his second sip. When he realized, he pulled it away to have a saliva string connecting him to the cup. Now years later he still won't come back and finish a cup in fear of the spit cup.

Animated Adventure Episode 52
An Animated Adventure was made of this story.