Bosko's Soda Fountain (1931) - Public Domain Cartoons

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Summary
Bosko, depicted as the owner/runner of a soda shop or ice cream parlor, serves sodas to a mouse and his old teacher (a hippo). His teacher's soda is sprayed in her face by a fan, causing her to leave the shop in anger. Then a dog enters the building and eats a pile of ice cream, causing the dog's body to become square-shaped. Bosko discovers what has happened to the dog and used its body as an accordion.

Meanwhile, Honey's bratty and spoiled cat-like son, Wilbur demands an ice-cream cone after rehearsing singing and the piano against his will. Bosko sends the dog away, and then delivers an ice cream to Wilbur. Wilbur dislikes the flavor Bosko delivered to him (vanilla) and rudely retaliates, which ends in Bosko sitting, surprised, in the washing basket with a pair of underwear on his head.