A portable refrigerator/freezer is the modern equivalent of the camping cooler. It’s a powered self-contained refrigerator and freezer all built into one. It stores food and drinks keeping them cool and fresh. Best of all, you don’t have to pack them with ice.
They are specifically designed with high-efficiency electric motors to keep perishables cold continuously so packing ice every few hours isn’t necessary. They are ideal for the Overlander because when you are in the middle of nowhere in the wilderness, you’re not going to find a neighborhood grocery store to buy ice.