we got a coleman think its 40-45 quart one it can stand up or lay down power cord was included for electric/ cig lighter adapter also. We paid 45.00 on sale at walmart ( marked down but brand new in box) and absolutely love it. We used it for our long drive down to WDW , plugging it in night before we left, packed cold items from home , and left it unplugged while driving checked it occasionally to make sure still good and cold, stopped over one night at motel on drive down, plugged in at motel overnight again. drove the rest of the way next am , without plugging in car battery,again things stayed very cold when we got to our resort plugged it in again right away and kept it plugged in through out entire stay, did the reverse on trip back home. It well paid for itself on one trip saving the 10.00 per night refrig rental at the resort.
