Duff Beer Party Bus

Duff Beer Party Bus, formerly known as the Duff Partymobile, is a party bus owned by Duff Beer.

History
When Moe's evening rush came into the bar one night, he told his customers they must have a designated driver. Barney became the designated driver. However, while of his friends enjoyed drunken antics, the Duff Partymobile arrived at Moe's with a bottomless mug of icy cold beer for Barney. Barney had an outburst, saying that he is the designated driver, and Duffman understood it and remained at the bar to party with the drunks.

The party bus visited Moe's Tavern after Moe called them to try and cheer Homer up.