The COOLULI 15L Cooler and Warmer is perfect for keeping in the back seat of your car while going on Road trips, camping trips, picnicking or for people who use their cars frequently for work. Keep your drinks cold and refreshing, no ice necessary. The difference between the COOLULI 15L Cooler/warmer and a normal Cooler is at the flip of a switch The device can warm foods or hot beverage Cooler/warmer plugs right into the cigarette lighter DC adapter in your car with the included wire. Once you arrive at your destination or unplug the device The Cooler will stay insulated for up 1-2 hours before being plugged into either another car or indoors with the included AC cable. No need to buy extra wires. COOLULI wants you to take your next road trip or camping trip to the next level and offer a new level of comfortability to people who are in the car The majority of the day for work. Check out our entire line of other innovative products.