Argon/CO2 mix from a flexible hose, located somewhere between the stove and the fridge.
It's well known that vacuum sealing your food lets it last longer, but a quick blast of inert gas into a tupperware, sandwich bag or milk bottle achieves the same thing without the impracticality (and crumpling indignity) of evacuation.
Also useful for putting out fires, and if the need arises, welding.