Right now you can pick up Aukey's 2-port USB car charger for just $7 with coupon code AUKCARS7. This car charger, unlike many others, sits pretty flush with most of the cigarette adapters, so you won't really even notice that it is there. Being relatively flush, there is less of a chance that you'll knock it out or bang it around by accident while moving in your car, and being able to charge two devices at the same time is a great feature.
Remember, you need coupon code AUKCARS7 to get the discount here. Odds are it won't last long at this price, so be sure to act quickly if you want one!