It's no Marauder's Map, but the Harry Potter I Solemnly Swear...Mischief Managed Transforming Mug
($18) is a pretty badass way to gulp down our morning coffee. Pour in the hot stuff and watch the mug change from black to white, and the message of "mischief managed" will appear. We're going to need several mugfuls of hot coffee this weekend as we embark on our first annual Harry-Potter-A-Thon. We're going to try and get through ALL of the movies in one weekend. Think we can manage it?