As a result of the 150,000 or so UK drivers who misfuel their cars each year, vehicle manufacturers increasingly fit filler necks designed to save their owner’s bacon. However, these anti-misfuelling flaps can also make it difficult to refuel from a portable container in an emergency, or even dose your car’s fuel tank with an additive or cleaner. Laser Tools has designed a funnel (part number 8021 for diesel cars) that’s designed to open the internal flap and allow fuel or additives to be poured directly into the tank. Made of tough polypropylene, it’s available from just £4.59 online.