I need suggestions

Our dinner dessert guests guest Tuesday night (otherwise known as my tenth grade English teacher, her husband, and their adorable 18-month-old son) brought a bottle of coconut rum. Now, we haven't opened it yet, but I'm fairly certain that the only member of this household who might possibly be interested in drinking it is the one who's underage.

So what would you do with a bottle of coconut rum that you weren't intending to drink or burn in a bonfire to signal passing ships?