The SS Greensleeves was a ship.
After escaping the Firemen of Fleengarr, the Eleventh Doctor, Amy and Rory saved the SS Greensleeves from invading space pirates, whilst also dealing with a hypomorph which had fused ice cream into its DNA. Amy and Rory lured the creature away in an escape pod, which resembled an ice cream cone. (COMIC: I Scream)
Behind the scenes Edit
The spaceship itself resembles an ice cream van, while the pod looks like an ice cream cone.