Hair in a Can is a can of spray that makes hair grow very quickly. It appears in The SpongeBob SquarePants Movie. King Neptune owns this spray.
It is a blue and yellow can that depicts its name written in red text and has an icon of brown hair, which the contents of the can contain.
Role in movie
King Neptune's servant was supposed to spray this on Neptune's bald head, but it then ends up in his eyes after King Neptune begins to get impatient.