This insulated bag, can be used for keeping your food cool or warming it up. With a standard USB connection, you can use any 5v powerbank (any normal powerbank will do), to keep your food warm. You can also even connect it to your car's outlet.
The bag is suitable to be used for long journeys, with economic power consumption. So you dont even need a high capacity powerbank to use.
Whether you are going for a hiking, camping or fishing trip, enjoy your food just the way it should be with this cooling/warming bag.