|Muggles' Guide to Harry Potter - Magic|
|First Appearance||Harry Potter and the Deathly Hallows|
In Harry Potter and the Deathly Hallows, Hagrid gives Harry a Mokeskin bag for his birthday. This is used for valuables; things placed in it can only be retrieved by the owner. Harry wears it around his neck for the rest of the book, keeping his most valued possessions in it.