ROADPRO Snackmaster Cooler/Warmer No fridge no problem with this SnackMaster deluxe cooler/warmer you can keep your favorite food and drinks cold or keeps preheated foods warm while on-the-road. Simply plug into your car/truck 12-volt socket and go. Clear plexiglass door allows you to see what you need before opening complete with an interior light. The seat belt slots allow you to keep the unit secure while driving and be used vertically or horizontally.