The Brookstone 12V Car Outlet Portable Heated 13oz Coffee Mug new box open. The convenient and practical solution for enjoying a hot cup of coffee while on the go. This mug is specifically designed to be used with a 12-volt car outlet, making it perfect for use in the car during long drives or road trips. With its sleek design and brand reputation, the Brookstone heated mug is a reliable choice for anyone looking to keep their coffee hot while on the move.