Compact design with major thermoelectric cooling and warming power: Proudly made in North America, Koolatron's 12V powered Traveller III is the ultimate personal iceless cooler. Save time and money by bringing your own food and drinks to work or on outings or day trips. With a durable hard plastic exterior and convenient shoulder strap, plus efficient thermoelectric cooling or warming, your lunch and snacks will be ready to eat whenever and wherever you are. Just plug into your vehicle's 12V receptacle for reliable cooling with no ice or ice packs taking up valuable space. You can even use the optional AC adapter (sold separately) to seamlessly transition from your vehicle to indoors.