Why not make sure you start the day off on the right footing, with the Tank Up Coffee Mug? After all, running on empty is no joke, so make sure your favorite cup of Joe is filled to the brim just the way you like it as you tackle the world. The moment you fill up your mug, the gauge will climb all the way from empty to the full mark. We’re not talking about pixie dust working their magic here, but old school heat-sensitive printing at work. Made out of porcelain, you will need to hand wash this if you do not want to leave your $11.99 to the mercies of a dish washer.