Adventure Time Season 6 Episode 29

Its the day of the month everyone loves. Super Porp Day (grape soda in a can). Fin, Jake, BMO and Marcy are skating and waiting at the local Squeez-E-Mart for the vending machine to be refilled with the grape soda. They begin to wonder where Super Porp comes from when Marcy says shes been drinking it since she was a little girl.