The Koolatron Travel Saver 12 Volt Cooler"s Large 45 Quart Capacity and Unique Domed Lid make it a great choice for those long road trips. No more costly stops along the way! Keep your groceries cold while you workout at the gym or pick-up the kids. The unique "domed" lid provides maximum space for larger bottles. As with most Koolatron"s , this model can also be used as warmer. The AC adapter, sold separately, will allow you to use the TRAVEL SAVER wherever there is standard household outlet. The P95 is ideal for long trips, big families and tailgate parties.