The Koolatron Travel Saver 12 volt Cooler features a large 45-quart capacity and a unique domed lid. This specially designed cooler can fit larger bottles or thermoses with ease. As with most Koolatron coolers, the Travel Saver can also be plugged into any household outlet with the AC Adapter, which is sold separately. This incredible cooler uses state-of-the art thermoelectric cooling technology. It features a durable brushless motor and internal air circulation for even temperature distribution. The Travel Saver is the perfect companion for camping, Rving, boating, or just plug it in at home and use it as a second fridge.