It was 1960 when its not as much commen as today to get a refrigerator to perserve the food. In that time it was the one off the most luxuries items. But with the passge of time technoolgy progress and now every home have a refrigerator. and in near future every room will be.Trend of getting a Mini fridge is going up with the passge of time now we have several brands with such kind of models. So it might be posssible that in future we build such robots which can serve the food or any other eatables with the easy.