Do you have a backseat (or front seat) driver who harps on your lead-footed, gas guzzling driving behavior? Well here’s a gadget that will do the harping with a lot more accuracy and much less yammering. The Digital Fuel Mizer gives you an audio and visual alert when you accelerate or brake inefficiently. That means that the next time you blow off a gray haired lady in a Geo Prism at a red light this greenish gizmo will let you know about it. The ‘Mizer” has a ‘long life’ battery so no wiring is needed and mounts anywhere around the interior of the vehicle. Features a bunch of sensors for accurate appraisal of your driving misdeeds.

$49.95 @ digitalfuelmizer.com