The Plug-In Commuter’s Warming/Cooling Mug is a real must-have for anyone who spends a lot of time on the road. The mug can keep a can of soda cold at 40F, and it can keep a cup of coffee 140 F hot. The device fits in to a cup holder and gets its power by plugging in to your car’s lighter. This clever gadget retails for $24.98.
