Item no. 182, 450ml (16oz.) heated mug, 12V, 32W.Plastic PP inner,Stainless steel outer, a USB plus ... connector is available. Item no. 1812, 450ml (16oz.) heated mug, 12V, 32W.stainless steel inner and plastic outer, a USB plus ... for easy cleaning and fast refills right when theyre needed. Heated auto Mug