Nano-technology also makes refrigerators, intelligent, knows what's near expiration, and move it in front of the refrigerator can also detect gases emitted from food spoilage and move the refrigerator to the front as well.
Nanotechnology also enables intelligent refrigerator that's not expire and move it to the front of the refrigerator. It also can detect gases emitted by rotten food. Refrigerator and move it forward as well.