Paradox in a Can comes in three sizes: Infinitely Large, Medium, and Non-existent. In 2003, a new version, Lemon Paradox in a Can, was test-marketed to select colleges, at which time it was discovered that a Lemon Paradox in a Can had already been test-marketed in 1999. Additional testing proved that Lemon Paradox in a Can had been a college favorite since 1964.