Bulman's Ultimate Witch's Hat Liner

Bulman's Ultimate Witch's Hat Liner was a special detachable liner made by Bulman's. It could be inserted into one's hat and was designed to repel Dark hexes.

An advertisement for the product appeared in the Daily Prophet. It touted the product's "new improved model," proclaiming it to be "indisputably the finest liner available today," used by Wizengamot members and the general wizarding public alike. The company offered a customer satisfaction guarantee and advised interested parties to send a self-addressed owl to its address.

Appearances

 * Harry Potter films
 * Harry Potter Limited Edition