Review on 🚗 Spardar 12V Car Kettle Boiler - Portable Electric Heater Cup with Temperature Display Screen for Water, Coffee, Tea, Milk - Fast Water Boiler & Heater for Road Trips - Gray - Ideal Gift by Rachel Ellis

Longer cable required. It's only about a meter long. It's hard to make it useful. You must be in the front seats of the car to use it. If it was a little longer, you could hang it on the car roof and use it outside the car. Also, it must be on a flat surface so that it cannot be moved. This thing should come with a rope or some kind of hanging device. If it would fit in a cup holder that would be great. However, if you have a car, bottled water, and instant coffee (Starbucks Veranda VIA), you can have a few cups of coffee just fine. That's why I give it four stars because it provides hot water.