tip-on n. a promotional item, such as a magnet or game piece, affixed to the cover of a publication. (source: Double-Tongued Dictionary)
Further reading
Quiz Guy John Chaneski serves up a Common Bonds puzzle, in which the object is to guess the common idea in each of three things. For example, what’s the one word that connects a grade on a report card, USDA inspected beef, and an incline? This...