The smile refrigerator

According to the report that the Sony Computer science research center said that they developed a new type refrigerator: a smile refrigerator. It is a refrigerator which you can easily open with a smile on your face, if you don' t smile the machine will hardly be open. It has won the "Good Design Reward." This new technology isn't  complicated one. There installed a Happiness Counter inside the machine, so it can tell the people's facial expression.
It is can not only keep people in a good mood, but also can let people to practice their smile.
It is a customized service, isn't it?