Attention: The RASKOG cart might be the most versatile product in all of IKEA (seriously). It's just as useful in your kitchen to hold spill-over pantry items as in your bathroom to corral makeup and toilet paper. - Cosmopolitan.co.uk
Bridget's idea too, to raise the floor and have storage underneath. Could be good in the kitchen to keep things cool, if the space inside was insulated. Could a hole be cut in the floor of the truck to make a larder space? That would make a great fridge!