Space is precious, in a MH. I've discovered there is a lot of room under our dash, anyways. I've been thinking, which is dangerous, or one of those small chest type refrigerators, on a slide under the dash area.
Plenty, of juice from alternator or inverter or generator.Maybe a long sipping straw from a jug of tea,, with lemon, of course through a hole in the refrigerator.
Of course half the our regular refrigerator is occupied with soft drinks, tea and so on, on a trip. probably three hundred pounds of them in cabinets, down low. Wife won't drink anything but Meller Yeller and it ain't available everywhere.