When there is a lot of food left over from the trip, think about starting with the portable electric cool box. Thanks to electric refrigeration, we're able to store more food, longer. This flexibility of when and what we eat has become an integral part of the daily diet.Leftovers: Whether you love them or hate them, you've probably eaten them. Some of us even plan on leftovers, cooking up a batch of something on Sunday to last us the whole week. Though they seem like a routine aspect of daily life, leftovers haven't always been as easy to save as popping Tupperware in the cool box.