According to its Kickstarter, the AnyCafé uses a totally original, patent-pending continuous brewing method that can take water of any temperature and a K-Cup, and produce 9.5oz of piping-hot coffee in the same time it takes to use a regular Keurig machine. The coffee drains straight into the thermos, ready to be sipped at your leisure. (Note: This thermos is NOT an official Keurig product... if that matters to you for some reason.)
The thermos uses a rechargeable lithium battery, which can reheat your beverage if it goes cold. The device can brew tea bags too, if coffee isn't quite your thing.